The Hyp-Nut-Tist(1935)

Popeye takes Olive to a stage show of a hypnotist (Bluto), who also levitates objects. While he's doing this, Popeye makes him lose his concentration, so in retaliation, the hypnotist pulls Olive on stage and turns her into a chicken. Popeye comes down to fight and the hypnotist tries to turn him into a monkey, but Popeye pulls a mirror into place. He recovers, and turns Popeye into a donkey, then smacks him around a bit, but spinach comes to the rescue.