What Level Does Alakazam Learn Role Play? Never — Move Exclusive to Ditto

Alakazam never learns Role Play. The move Role Play is exclusive to Ditto (and Pokémon that can Transform, like Mew/Smeargle via Sketch).

Alakazam's movepool focuses on Psychic-type special attacks and support (Calm Mind, Recover, Trick). It cannot copy the target's ability — that's Role Play's effect.