Emerald: Koffing
Diamond: Geodude (deleted when I started a new game)
Platinum: Roselia, Sneasel, Marill, Blissey (all lost)
HeartGold: Mewtwo (lost)
SoulSilver: Tentacool, Golbat, Nidorina
Black: Gothita
White: Sewaddle, Golduck, Lunatone
(yeah, I'm lucky)