vinfamy's post in Four Play not Triggering Animations (Gun animations work) was marked as the answer
Untick Four-Play and all its plugins' esps. Go in game, save, exit game. Then tick all esps again, go in game, load.
Four-Play and Four-Lei must always be initialized at the same time in a save ("Loading Leito's animations" must come before "Four-Play: setting up slots"), or Four-Play will still point to Crazy's animations.