All optional bosses, and where to find them?

[Major]

Where can i find all optional bosses? You can say as much spoilers as you want without game endings (still need to get D and E), and don't tell me who level 99 boss is.

[Ogami]

There are only 2 optional bosses. For one you need to do a specific quest chain that ends in a boss fight (level 99). Thats doable during route A/B/C. The other secret boss fight is one of the side endings (Y). For it to trigger you need to collect 100% of all available weapons in the game (40) and upgrade them all to level 4 and then do some secifc things. A lot of grinding for that one.
Cant get more specific for both since the quest description would spoiler the bosses.

[Major]

So Emil and statue in Amusement Park only? Ok, i can find something through google i think.

[Ogami]

Originally posted by Major:

So Emil and statue in Amusement Park only? Ok, i can find something through google i think.

I dont really count the statue as a secret boss since it respawns, its just a really tough normal enemy.
And well, if you already now about Emil then ok. The 2 boss fights are both Emil, once by finding his home and stealing his mask, then talking to him, after that going back and steal it from the locked chest ( need hacking). That triggers the boss fight on leaving the room.

And the other boss fight when upgrading all the weapons to max is also Emil but in the desert and is connected to the Y ending.
Btw if you want to get that ending, trigger it first and THEN win the boss fight the second try.
If you win the boss fight the first time you can never again trigger ending Y on that save file.

[Major]

So i bet ending Y is when i die at this moment?