Training Hall Glitch
While your trying to do the Missingno Glitch, battle one pokemon and fly to Training Hall. Then go in and go downstair. Before you battle, save the game. After you save, the lady will ask if you want to battle Green?Green?Green?Green?Green?Green (instead of Cal) accept it and he will have a level 0 Primape. Note when he summon his pokemon it will freeze the game. Turn it off and on again go and to the lady again but this time the Gameboy will turn off again by itself. Also leave your gameboy off for 2-3 days and turn it on then the glitch will work again.