Boss Weaknesses/Special Interactions

I was frustrated that I had to go digging for this info so here is a quick reference for the bosses weaknesses all in one place.

What is known

Echobeast:
- Charged shots(Nina) knock its crystals back at it.

- Echobeast's Sound Waves are destroyed by Ace's Osafune or Nina's Negation Pulse (Both acquired from Legacy).

Legacy:
- Nina's Jagged Bolt (from Capital Punishment) or Ace's Raijin Call (from Hoot Omega) can instantly destroy the shapes Legacy summons, dealing damage to Legacy in the process.

Hoot Omega:
- Nina's Crystal Wave (from Echobeast) will temporarily freeze Hoot Omega. This will also stop the lightning strikes for the rest of the fight.

Capital Punishment:
- His fists (and thus the boss himself) can be damaged by the exploding containers that spawn on the bottom of the arena, by Nina's Zen Mortar (from Zen Primus), or by Ace's Leviathan (from Experiment 9).

- Attacks that pierce enemies (for example, Nina's Wave Beam) can go through the fists and damage Capital Punishment even when he would otherwise be protected by them.

Absolution:
- Ace's Ryuusei (from Capital Punishment) will deal 999 damage to the stained glass during Absolution's second phase.

- Nina's Rending Whirl (from Hoot Omega), or Ace's Osafune (from Legacy)can destroy the voids.

- If the red stained glass is destroyed last, Absolution will get a speed buff for the rest of the fight, so destroy it first.

Lethal Tempo:
- Nina's Rending Whirl (from Hoot Omega) can hit all four at once.

- Nina's Crushing Void (from Absolution) can absorb the gears. When charged, this has the potential to one-shot multiple targets at once.

- Ace's Echo Shell (from Echobeast) can reflect gears directly back to the target that originally launched it.

- Ace's Void Double (from Absolution) can be used to hit multiple parts of the boss at once.

- The fight gets more difficult as you defeat more parts of Lethal Tempo, it is recommended to knock them down to the lowest amount of HP you can without killing them, then kill all four at once.

Zen Primus:
- Ace's Ryuusei (from Capital Punishment) will deal 999 damage to the statues that generate Zen Primus's shield during his second phase.

Experiment 9:
- No tips, tricks weaknesses or special interactions have been found yet or exist? Good Luck i guess.

Thanks and Acknowledgments

Big thanks to Steam users: HeraldOfOpera, Cirom and Ludibrius for help from the forums.

Thanks to Steam user robertobear for his big guide.

Credit to https://20xx.wiki.gg/wiki/20XX_Series_Wiki for additional tips.

If anyone has any other useful boss weakness or interactions info let me know and ill put it in.

[AF234]

I have no idea if this is supposed to happen or not, but if you combine Aiming Gear and Crystal Wave to get Aiming Crystal (Lethal Tempo + EchoBeast) and use it to hit Capital Punishment's fists in their downward attack, they'll end up flying up and out of the screen for the rest of the fight.
This means you don't have to fight capital punishment with his weapons at all, which makes him kind of a joke boss at that point.

[PLMMJ]

Update for 1.3 please?

Also @Azzy Asbourne there is none, the best you can do is use Dracopent's Pride to leech HP off their various summons, and I think even that might've been patched.

[Azzy Asbourne]

Ace's charged saber can also deflect Echobeast's crystals.

Also, does anybody know the weaknesses of Elanor and the Midgar bosses?

[Rattango]

For lethal tempo its definitely just how you come into the fight instead. If you have ways to deflect some of the gears thrown at you or you have confidence in killing all 4 very quickly, you can definitely can kill them all at once. Way easier time to juggle between the 4. However if you have no defensive options, It's definitely better to create a safe space either at the bottom or at the top and start working your way to the other end (top/bottom). My favorite way to deal with all 4 at once is using the combination skill of tornado and black hole. Just my preference

[KamiNoBaka]

I disagree with your advice on the Lethal Tempo fight. I find it much easier to focus each part down, starting at the bottom and working my way up.

[Bzaroo]

i found one of experiment 9's weaknesses. you have to get the unstable defense AUG and you need to build it up when attacking experiment 9, and when its max (40) try not to get hit, and just RUN INTO EXPERMIENT 9 TO DEAL ALOT OF DAMAGE

[Leviticus The XIII]

the upgrade Legacy's power does wonders on Experiment 9, Hoot Omega, Absolution, Lethal Tempo. Able to bounce everything right back at it. doesn't work on the rest, for varied reasons.

[PLMMJ]

The Glass Twins can hit themselves with their own shots, it stuns them

[ComatosePhoenix]

the tornado from lil hoot can also destroy absolution's voids.

In the architect fight, If she throws gears, those can also be used to power up crushing void.

The crystal duo in Absolution can hurt itself with its own crystal attack if it bounces of the mirrors correctly. This has a unique animation but I'm not sure if it actually does anything.