Bangboo VS Ethereal Event Guide for Zenless Zone Zero

Bangboo VS Ethereal Event Guide for Zenless Zone Zero

Bangboo VS Ethereal is a Tower Defense Event where you will have to help Bangboos to protect their base from Ethereal intrusion! Help them out and receive generous rewards!

Last updated on Dec 23, 2024 at 19:24 by Jaymo
1.

Bangboo VS Ethereal Event

This event will take place from December 20, 2024 until January 20, 2025!

Bangboo VS Ethereal Event
1.1.

What is the Bangboo VS Ethereal Event About?

Bangboo VS Ethereal is a tower defence event where you will have to assist Bangboos in various tasks, in order to receive the prestigious Hollow Operation Certificate!

You will have to deploy different Bangboo in order to prevent Ethereals from approaching your base.

1.2.

How do you Participate in the Bangboo VS Ethereal event?

This event will take place in the new Reverb Arena zone that releases with version 1.4 of the game.

You need to reach Inter-Knot Lv. 15 and complete Agent Story Mole in the Hole (I) to participate.

Head to the Reverb Arena and talk to Coach Aster.

During the event, you can find Coach Aster at Reverb Arena and assist it in guiding Bangboo to defeat Ethereals in various stages and complete the commissions. The stages will be gradually unlocked as the event progresses.

In the arena you will have to place and guide the Bangboos in order for them to fight and stop the Ethereals from reaching the objective. It is similar to any tower defence game you may have seen or played before.

Defeating the enemies will give you additional points that you can use to upgrade the Bangboos or the skills, helping you progress in further stages.

Your goal is to prevent enemies from entering the base. In order to do so, drag and drop the Bangboo to different positions on the assessment field. Once on the field, the Bangboo will attack any nearby enemy.

Deploying Bangboo costs Assessment Points, so make sure you have enough. The amount you have is shown down left, and it will constantly be refilled.

You can pause the game to observe the battlefield if it advances too fast.

2.

Bangboo VS Ethereal Solutions

General Assement Day 1 Special Environment Assement Day 2 Tactical Qualification Assement Day 3 Special Assement Day 4
2.1.

General Assessment 01

Enemies:

  • Tyrfing
  • Vicious Striker
  • Tyrfing

Assessment Bangboo Positions:

Bangboo VS Ethereal Walkthrough
Bangboo VS Ethereal Walkthrough
Bangboo VS Ethereal Walkthrough

The first assessment is the tutorial, so you should be able to pass it no matter where you put your Bangboos. We do recommend you choose to put two BoollseyeBoollseye Bangboo and one PlugbooPlugboo.

2.2.

General Assessment 02

Enemies:

  • Tyrfing
  • Faun
  • Vicious Striker
  • Tyrfing

Assessment Bangboo Positions:

Bangboo VS Ethereal Walkthrough

Place PenguinbooPenguinboo first, it will serve as a last rampart against enemies. After this one, place the PlugbooPlugboo as shown in the image bellow:

Bangboo VS Ethereal Walkthrough
Bangboo VS Ethereal Walkthrough
Bangboo VS Ethereal Walkthrough
Bangboo VS Ethereal Walkthrough

We only used 5 Bangboo, but you can place an additional BoollseyeBoollseye or PlugbooPlugboo if you want to be extra safe.

2.3.

General Assessment 03

Enemies:

  • Tyrfing
  • Alpeca
  • Faun
  • Vicious Striker

Assessment Bangboo Positions:

Place BoollseyeBoollseye first, and as soon as you can, place PenguinbooPenguinboo:

Bangboo VS Ethereal Walkthrough
Bangboo VS Ethereal Walkthrough
Bangboo VS Ethereal Walkthrough
Bangboo VS Ethereal Walkthrough

From this stage on you can add buffs. For now you only have one, so use this one, but more will unlock as you advance through the stages.

2.4.

General Assessment 04

Enemies:

  • Tyrfing
  • Alpeca
  • Faun
  • Vicious Striker

Assessment Bangboo Positions:

Bangboo VS Ethereal Walkthrough

After you placed the first BoollseyeBoollseye, get a PenguinbooPenguinboo on the floor to block one of the two entrances, and the enemies can pass through both ways this time. We choose to put the first Penguin down left, with an AvocabooAvocaboo to heal him. After you placed your two PenguinbooPenguinboo to protect the exits, add a PlugbooPlugboo towards the middle.

Bangboo VS Ethereal Walkthrough
Bangboo VS Ethereal Walkthrough

AvocabooAvocaboo can be really helpful especially for the PenguinbooPenguinboo who are on the floor and take more damage.

2.5.

General Assessment 05

Enemies:

  • Tyrfing
  • Alpeca
  • Faun
  • Vicious Striker

Assessment Bangboo Positions:

Place the BoollseyeBoollseye first to have some range. Then put the PenguinbooPenguinboo right in the middle, and protect them both with AvocabooAvocaboo:

Bangboo VS Ethereal Walkthrough
Bangboo VS Ethereal Walkthrough
Bangboo VS Ethereal Walkthrough
Bangboo VS Ethereal Walkthrough

You should have access to AvocabooAvocaboo's buff, which increases his healing range. Make sure to use it.

2.6.

General Assessment 06

Enemies:

  • Tyrfing
  • Alpeca
  • Faun
  • Vicious Striker
  • Faun
  • Vicious Striker

Assessment Bangboo Positions:

deploy ExplorebooExploreboo first for more Assessment Points. Then place down a BoollseyeBoollseye, and right after a PenguinbooPenguinboo in the middle. Finish with an AvocabooAvocaboo that can protect them all:

Bangboo VS Ethereal Walkthrough

Continue with a PlugbooPlugboo on top right, as enemies come in masses from there, and another BoollseyeBoollseye down left. If an enemy manages to go through, you can place PlugbooPlugboo next to ExplorebooExploreboo instead.

Bangboo VS Ethereal Walkthrough

You will get ExplorebooExploreboo for this stage. Deploy him first, as he helps with Assessment point regeneration.

2.7.

Special Environment Assessment 01

Enemies:

  • Tyrfing
  • Blastcrawler
  • Vicious Striker
  • Blastcrawler
  • Vicious Striker

This time the stage is a bit different. Gas Burners are present on the stage and any Bangboo standing on them continuously take damage. Make sure to pick AvocabooAvocaboo as a buff, as he will be needed! You can also pick ExplorebooExploreboo as second buff for faster assessment point regeneration.

Assessment Bangboo Positions:

Start with BoollseyeBoollseye, ExplorebooExploreboo, and a PenguinbooPenguinboo at the end to block the exit if needed.

Bangboo VS Ethereal Walkthrough
Bangboo VS Ethereal Walkthrough

Protect the line down with a PenguinbooPenguinboo and BoollseyeBoollseye, and add an AvocabooAvocaboo towards the middle. The last Bangboo you add can be another PenguinbooPenguinboo on a Gas Burner near the AvocabooAvocaboo.

Bangboo VS Ethereal Walkthrough
2.8.

Special Environment Assessment 02

Enemies:

  • Blastcrawler
  • Blastcrawler

Take ExplorebooExploreboo and AvocabooAvocaboo again as buffs.

Assessment Bangboo Positions:

Place ExplorebooExploreboo directly for regen, and then a PaperbooPaperboo on the top line, with an AvocabooAvocaboo to protect it.

Bangboo VS Ethereal Walkthrough

Add another PaperbooPaperboo on the line down, with an AvocabooAvocaboo for healing

Bangboo VS Ethereal Walkthrough

Add another PaperbooPaperboo on top, but leave one square free in between with the first one, otherwise when the enemies explode they will hit both. Put down an AvocabooAvocaboo on top, you will need it.

Bangboo VS Ethereal Walkthrough
2.9.

Special Environment Assessment 03

Enemies:

  • Tyrfing
  • Hoplitai
  • Faun
  • Hoplitai
  • Faun

Use PaperbooPaperboo and AvocabooAvocaboo buffs.

Assessment Bangboo Positions:

Place PaperbooPaperboo down first, and as soon as you can, place AvocabooAvocaboo:

Bangboo VS Ethereal Walkthrough

Do the same on the top line, and add two PenguinbooPenguinboo in the middle.

Bangboo VS Ethereal Walkthrough
2.10.

Special Environment Assessment 04

Enemies:

  • Tyrfing
  • Golden Bangboo
  • Faun
  • Vicious Striker
  • Tyrfing
  • Faun

This stage has a special Bangboo enemy. It will not attack your own Bangboo, but if you defeat it you will get a pleasant surprise.

Pick PaperbooPaperboo and AvocabooAvocaboo as buff.

Assessment Bangboo Positions:

Place two ExplorebooExploreboo at the start, this time you will need more assessment point regeneration. As soon as possible, place a PenguinbooPenguinboo in the middle.

Bangboo VS Ethereal Walkthrough

Protect PenguinbooPenguinboo with an AvocabooAvocaboo, and add a BoollseyeBoollseye on top.

Bangboo VS Ethereal Walkthrough

Use RocketbooRocketboo when the Golden Bangboo appears (Rocketboo does not stay in place, he will just explode on the Golden Bangboo and leave). Add two more BoollseyeBoollseye to make sure to defeat the Golden Bangboo.

Bangboo VS Ethereal Walkthrough

Remove the Bollseyes top left, and replace it with a PaperbooPaperboo to protect the line down. You can also remove an ExplorebooExploreboo now, and replace it with a PlugbooPlugboo.

Bangboo VS Ethereal Walkthrough

When the last wave of enemies arrive on top, remove the entrance BoollseyeBoollseye and use a RocketbooRocketboo on the wave.

2.11.

Special Environment Assessment 05

Enemies:

  • Dullahan
  • Tyrfing
  • Faun
  • Vicious Striker
  • Vicious Striker

use AvocabooAvocaboo and PaperbooPaperboo buff, and the Grill Mode chip.

Assessment Bangboo Positions:

Place two ExplorebooExploreboo in the middle, a PaperbooPaperboo on top and a PenguinbooPenguinboo to protect the line down.

Bangboo VS Ethereal Walkthrough

Once your PaperbooPaperboo is not on cooldown anymore, replace the PenguinbooPenguinboo with another PaperbooPaperboo.

Bangboo VS Ethereal Walkthrough

Add two PlugbooPlugboo in the middle to help with damage, and use a RocketbooRocketboo on the top lane when there is too many enemies.

Bangboo VS Ethereal Walkthrough

Add AvocabooAvocaboo and upgrade it, in order to make it through Dullahan.

Bangboo VS Ethereal Walkthrough
2.12.

Special Environment Assessment 06

Enemies:

  • Dullahan
  • Dullahan
  • Tyrfing
  • Faun
  • Faun
  • Blastcrawler
  • Vicious Striker

Use PaperbooPaperboo and PlugbooPlugboo buffs. Use the Grill Mode Chip.

Assessment Bangboo Positions:

Deploy two ExplorebooExploreboo on each sides, and a PaperbooPaperboo with a PlugbooPlugboo on top. Once the cooldown is down, add a PaperbooPaperboo on the bottom line as well.

Bangboo VS Ethereal Walkthrough

Place PlugbooPlugboo on the bottom line as well, and add two AvocabooAvocaboo on each line. The exploding enemies will destroy your PlugbooPlugboo, but you will have time to add two new ones. Remove an ExplorebooExploreboo if needed. Upgrade the two new PlugbooPlugboo.

Bangboo VS Ethereal Walkthrough

Once Dullahan arrives, you can use a RocketbooRocketboo on one of them, or remove ExplorebooExploreboo and replace it with another PlugbooPlugboo if you miss damage.

2.13.

Tactical Qualification Assessment 01

Enemies:

  • Tyrfing
  • Ahriman
  • Alpeca
  • Faun
  • Vicious Striker

Take PenguinbooPenguinboo and PlugbooPlugboo buffs. Pick the Exam integration Chip. For this round, Blowers will be on the battlefield. If you place any Bangboo on them they get an increased skill effect range boost.

Assessment Bangboo Positions:

Start with an ExplorebooExploreboo and a BoollseyeBoollseye on the boost in the middle. Add PenguinbooPenguinboo near the exit to intercept the enemies circling around the place. Protect the exit with PaperbooPaperboo.

Bangboo VS Ethereal Walkthrough

Add AvocabooAvocaboo to protect PenguinbooPenguinboo, and a BoollseyeBoollseye on another boost.

Replace ExplorebooExploreboo with an AvocabooAvocaboo next to the BoollseyeBoollseye in the middle. Add another PaperbooPaperboo and PenguinbooPenguinboo to protect the second exit.

Upgrade your PenguinbooPenguinboo when possible.

Bangboo VS Ethereal Walkthrough
2.14.

Tactical Qualification Assessment 02

Enemies:

  • Tyrfing
  • Ahriman
  • Alpeca
  • Faun
  • Blastcrawler
  • Vicious Striker
  • Vicious Striker

From this round on, you have access to Faction Bangboos. They can only be used for one round, but are more powerful than normal Bangboo.

Take PenguinbooPenguinboo and PaperbooPaperboo as buffs. use the Exam Integration Chip.

Assessment Bangboo Positions:

Place the Bangboo in the following order: ExplorebooExploreboo, PlugbooPlugboo, PenguinbooPenguinboo on the bottom line, AvocabooAvocaboo, PenguinbooPenguinboo on the top line middle, AmillionAmillion, and a BoollseyeBoollseye on the bottom line.

Bangboo VS Ethereal Walkthrough

Add another PenguinbooPenguinboo on the top line near the exit. Replace ExplorebooExploreboo with a PlugbooPlugboo that you place on top near the exit.

Bangboo VS Ethereal Walkthrough
2.15.

Tactical Qualification Assessment 03

Enemies:

  • Arlaune
  • Tyrfing
  • Alpeca
  • Blascrawler
  • Vicious Striker

Use PenguinbooPenguinboo and AvocabooAvocaboo buffs. Take the Exam integration Chip.

Assessment Bangboo Positions:

Place an ExplorebooExploreboo and AmillionAmillion in the middle. Add a BoollseyeBoollseye on the left side on the boost.

Bangboo VS Ethereal Walkthrough

Add PenguinbooPenguinboo on the left before the exit, and SafetySafety on the right before the exit. Place PlugbooPlugboo on the boost on the right, and an AvocabooAvocaboo to protect them.

Upgrade PenguinbooPenguinboo and the two AvocabooAvocaboo.

Bangboo VS Ethereal Walkthrough
2.16.

Tactical Qualification Assessment 04

Enemies:

  • Tyrfing
  • Hoplitai
  • Faun
  • Vicious Striker
  • Tyrfing

Pick PaperbooPaperboo and PenguinbooPenguinboo as buff. Take the Exam Integration Chip.

Assessment Bangboo Positions:

You can only place Bangboo on the ground this time. Place SafetySafety in the middle where all enemies pass. Add ButlerButler, he will heal everyone around him. Add PenguinbooPenguinboo for damage, and a PaperbooPaperboo for blockage behind.

Bangboo VS Ethereal Walkthrough

You can add another PenguinbooPenguinboo on top of PaperbooPaperboo if you want, or use a RocketbooRocketboo towards the end on the two bigger enemies to kill them faster.

2.17.

Tactical Qualification Assessment 05

Enemies:

  • Arlaune
  • Dullahan
  • Tyrfing
  • Ahriman
  • Alpeca
  • Hoplitai
  • Faun
  • Blastcrawler
  • Vicious Striker
  • Tyrfing
  • Blastcrawler

use PlugbooPlugboo and BoollseyeBoollseye buff, and the Exam Integration chip.

Assessment Bangboo Positions:

Place ExplorebooExploreboo and PaperbooPaperboo on the bottom line, and protect them with AvocabooAvocaboo as soon as possible. Add AmillionAmillion on the boost on top as soon as available to fight off the incoming flying enemies. Put down PenguinbooPenguinboo near Amillion on top to help.

Bangboo VS Ethereal Walkthrough

Add BoollseyeBoollseye on the bottom line to help with damage, and remove ExplorebooExploreboo to replace with PlugbooPlugboo on top. Upgrade them when possible.

Bangboo VS Ethereal Walkthrough
2.18.

Tactical Qualification Assessment 06

Enemies:

  • Arlaune
  • Dullahan
  • Tyrfing
  • Blastcrawler
  • Vicious Striker

Use BoollseyeBoollseye and PlugbooPlugboo buffs. Use the Exam integration Chip.

Assessment Bangboo Positions:

Start with ExplorebooExploreboo, and place PaperbooPaperboo as soon as possible. Add ButlerButler when available in the middle.

Bangboo VS Ethereal Walkthrough

Place BoollseyeBoollseye on the boost in the middle, and PlugbooPlugboo on the right.

Bangboo VS Ethereal Walkthrough

Add AmillionAmillion down left, and PenguinbooPenguinboo to protect the right exit. You cna upgrad PlugbooPlugboo and BoollseyeBoollseye.

Bangboo VS Ethereal Walkthrough
2.19.

Special Assessment 01

Enemies:

  • Dullahan
  • Tyrfing
  • Blascrawler
  • Vicious Striker

You can only deploy one bangboo on the field for this assessment.

Take PaperbooPaperboo and BoollseyeBoollseye buffs. Use the Energy Saving Mode Chip.

Assessment Bangboo Positions:

Place AmillionAmillion, he will take care of the first wave.

Bangboo VS Ethereal Walkthrough

As soon as the first wave is over and you have the possibility, replace AmillionAmillion with SafetySafety. He will have an easier time drilling through the tougher enemies.

SafetySafety will manage to hold through the rest of the enemies. When the last enemy arrives, wait until he defeats SafetySafety, and then launch RocketbooRocketboo at him. This should finish him.

Bangboo VS Ethereal Walkthrough
2.20.

Special Assessment 02

Enemies:

  • Tyrfing
  • Hoplitai
  • Faun
  • Blastcrawler
  • Vicious Striker

You can only use PenguinbooPenguinboo during this assessment. Use the PenguinbooPenguinboo buff and the Exam integration chip.

Assessment Bangboo Positions:

Put PenguinbooPenguinboo on each sides and in the middle, and then wait and replace them as soon as they die. if you manage in between you can upgrade those on the sides.

Bangboo VS Ethereal Walkthrough
2.21.

Special Assessment 03

Enemies:

  • Dullahan
  • Dullahan
  • Tyrfing
  • Tyrfing
  • Faun
  • Blastcrawler
  • Vicious Striker

Bangboos don't need assessment point to be upgraded during this stage. Use ExplorebooExploreboo and BoollseyeBoollseye buffs, and the Energy-saving mode chip.

Assessment Bangboo Positions:

Place ExplorebooExploreboo and BoollseyeBoollseye and upgrade both directly.

Bangboo VS Ethereal Walkthrough

Place ButlerButler and SafetySafety. Then place AmillionAmillion at the start, and PlugbooPlugboo.

Bangboo VS Ethereal Walkthrough

Place PenguinbooPenguinboo and PaperbooPaperboo near the exit just in case anyone would slip through.

Bangboo VS Ethereal Walkthrough

Towards the end launch RocketbooRocketboo at the 3 bigger enemies.

2.22.

Special Assessment 04

Enemies:

  • Dullahan
  • Tyrfing
  • Ahriman
  • Alpeca
  • Hoplitai
  • Blastcrawler
  • Vicious Striker

You can not deploy brave Bangboos this time. Use PlugbooPlugboo and BoollseyeBoollseye buffs, and the Exam Integration Chip.

Assessment Bangboo Positions:

Place ExplorebooExploreboo and BoollseyeBoollseye first, then protect them with ButlerButler, and add AmillionAmillion in the middle.

Bangboo VS Ethereal Walkthrough

Add PlugbooPlugboo and another BoollseyeBoollseye. Upgrade both and the previous BoollseyeBoollseye as well.

Bangboo VS Ethereal Walkthrough
2.23.

Special Assessment 05

Enemies:

  • Dullahan
  • Dullahan
  • Tyrfing
  • Ahriman
  • Vicious Striker
  • Vicious Striker

Cooldown for redeployment is only 3 seconds for all Bangboo this round. Take ExplorebooExploreboo and PaperbooPaperboo for buff, and the Grill mode chip because there will be burners this round as well.

Assessment Bangboo Positions:

Place two ExplorebooExploreboo, you will need the regeneration. Place PlugbooPlugboo on the top line first, and then PenguinbooPenguinboo on the bottom line as soon as possible.

Bangboo VS Ethereal Walkthrough

Place another PlugbooPlugboo and PenguinbooPenguinboo to have the same set up on both lines. You can upgrade the ExplorebooExploreboo if you feel like you need faster regeneration. Be careful as the flying enemies are really fast, and don't really get stopped until they get attacked. The Plugboos are suppose to attack them and stop them, but it can take you a couple of tries until it works properly for this one.

Bangboo VS Ethereal Walkthrough

Place two PaperbooPaperboo and upgrade them as soon as possible.

Bangboo VS Ethereal Walkthrough

When you have enough energy, replace the ExplorebooExploreboo with two AvocabooAvocaboo. When one of the PenguinbooPenguinboo dies, use RocketbooRocketboo on the same side. Then jsut place back PenguinbooPenguinboo when he dies.

Bangboo VS Ethereal Walkthrough
2.24.

Special Assessment 06

Enemies:

  • Arlaune
  • Dullahan
  • Tyrfing
  • Ahriman
  • Alpeca
  • Hoplitai
  • Faun
  • Blastcrawler
  • Vicious Striker
  • Tyrfing

You can only recover Assessment Points when enemies die, and can not longer use ExplorebooExploreboo. Pick BoollseyeBoollseye and PenguinbooPenguinboo buffs. Use the Exam integration Chip.

Assessment Bangboo Positions:

Place BoollseyeBoollseye first. Wait until he kills some enemies and then put down PenguinbooPenguinboo. When possible upgrade BoollseyeBoollseye and place AvocabooAvocaboo. You can also upgrade PenguinbooPenguinboo before the vicious strikers arrive (the second wave).

Bangboo VS Ethereal Walkthrough

Add another BoollseyeBoollseye on the front line and upgrade it, as well as another PenguinbooPenguinboo with an upgrade as well. Last, place AmillionAmillion as support on the front line.

Bangboo VS Ethereal Walkthrough

When you finish the Special Assessment 6 you will be able to obtain all the rewards. There is two additional optional stages that you can complete for a few dennies and 4 Bangboo System Widget. The two special stages let you use everything you learned so far. You can beat the two stages in multiple various ways so they should not pose any issue if you want to try them out.

2.25.

What are the Bangboo VS Ethereal Rewards?

During the event, you can earn the following rewards:

  • 560 Polychromes
  • 12 W-Engine Energy Module
  • 180,000 Dennies
  • 16 Bangboo system widget
  • 14 Specialized Freeze chip
  • 16 Senior Investigator Log
  • On unique collectible that can be displayed in your room
  • One Namecard
2.26.

Changelog

  • 23 Dec. 2024: Day 4 walkthrough added.
  • 22 Dec. 2024: Day 3 walkthrough added.
  • 21 Dec. 2024: Day 2 walkthrough added.
  • 20 Dec. 2024: Day 1 walkthrough added.
  • 19 Dec. 2024: Event information added.
  • 09 Dec. 2024: Guide added.
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