I'm not going to do anything competitive. The typical grass/fire/water trio and three wildcards
SoulSilver:
Meganium(Trade), Typhlosion, Politoed, Skarmory, Sneasle, Ursaring
HeartGold:
Feraliagtr, Houndoom, Bellosom, Ampharos, Tyranitar, Scizor
Strictly Johto pokemon. No Kanto, Hoenn, or Sinnoh ones