Joat
Gum Phoenix
I have created a custom boss. However, despite checking the corresponding thing tag and making sure that, upon dying, it triggers A_Fall, A_BossScream, and A_BossDeath (in that order), the level goes on even after the boss is defeated. I could theoretically use an egg capsule, but that would make no sense, because this boss has absolutely no connection with Eggman or his schemes.