Free Celebi

[Evolite]

An absolute waste of game data, basically.

http://www.serebii.net/attackdex-xy/celebrate.shtml

[Kyuu]

I really doubt that's the reason since we all knew from the beginning they would fail at trying to make a good hack check.

I assume the hack check is just checking for illegal moves/abilities. Doesn't actually check if they've been legitimately implemented in the game though.