Infinite survival mode time

Highlight the survival mode option, then hold Start + Triangle and press Circle.

Play as Krizalid

At the character selection screen in team versus or single versus modes, highlight the random character icon. Then, hold Select and press Circle, X, Triangle, Square. Krizalid will appear below the random character icon. Note: Highlight any character, then hold Start and press Square, Circle, X, Triangle, Square in the Japanese version of the game.