Returns 1 if the specified animation action exists for the player (only checks P1's animation data. If P1 has been given P2's animation data by a hit, SelfAnimExist will not check P2's animation data to determine whether or not a given action exists).

The result of this trigger is undefined if the player has been placed in a custom state by a successful hit. In this situation, use SelfAnimExist.

Format: SelfAnimExist(exprn)

Arguments:

- exprn (int): An expression evaluating to an animation number.

Return type: boolean (0 if false or 1 if true)

Error conditions: Returns 'Bottom' if exprn evaluates to 'Bottom'.

Example:

`trigger1 = !SelfAnimExist(200)
; Triggers if the player's own animation data is missing action 200.`