specific trainers

How Do You Teach Gengar Hypnosis? 1 Answer. Gengar Learns Hypnosis at Lv. 1. If you already have a levelled Gengar, go to the Move Relearner in either of the games to relearn Hypnosis. How do you teach gengar hypnosis in fire red? Level up your Pokemon, in the event that you have captured Poliwag,