Level 20 Spearow = Mew
Level 22 Spearow = Gyarados
Level 26 Spearow = Gastly
Level 25 Raticate = Fearow
Level 27 Raticate = Kadabra
Level 29 Raticate = Onix
Level 29 Muk = Psyduck
Level 33 Muk = Electabuzz
Level 25 Weezing = Magmar
Level 19 Oddish = Slowpoke
Level 22 Oddish = Kadabra
Level 24 Oddish = Hitmonlee
Level 26 Oddish = Golem
Level 29 Voltorb = Machoke
Level 19 Pidgey = Gyarados
Level 26 Pidgey = Staryu
Level 26 Machop = Staryu
Level 29 Machoke = Kadabra
Level 33 Machoke = Hitmonlee
Level 24 Doduo = Blastoise
Level 26 Doduo = Blastoise
Level 28 Doduo = MissingNo.
Level 25 Fearow = Chansey
Level 27 Fearow = Hitmonlee
Level 29 Fearow = Arbok
Level 34 Dodrio = Magmar
Level 10 Poliwag = Grimer
Level 29 Tangela = MissingNo.
Level 31 Drowzee = Venonat
Level 34 Hypno = Dratini
Level 38 Hypno = Omanyte
Level 34 Kadabra = Horsea
Level 33 Arbok = Electabuzz
Level 34 Arbok = Magneton
Level 43 Weezing = Pikachu
Level 29 Grimer = MissingNo.
Level 2 Rattata = Voltorb
Level 3 Ratatta = Voltorb
Level 4 Ratatta = Nidoking
Level 2 Nidoran(m) = Nidoking
Level 3 Nidoran(m) = Nidoking
Level 22 Nidoran (Safari Zone) = Staryu
Level 26 Venonat = MissingNo.
Level 28 Venonat = Tangela
Level 23 Ditto = Growlithe
Level 26 Ditto = Diglett
Pinsir (No transform!)
Pidgey (Level 18 Pidgeotto)
Fearow (Level 14 Pikachu)
Level 29 Wigglytuff = Kadabra
Level 3 Pidgey = Nidoking
Level 49 Dodrio = Articuno