GEN I:
Red (TAKEN)
Blue (TAKEN)
Green (TAKEN)
Yellow (more of a last resort)
GEN II:
Gold
Silver (TAKEN)
Crystal
GEN III:
Ruby
Sapphire (TAKEN)
Emerald (TAKEN)
GEN IV:
Diamond (TAKEN)
Pearl
Platinum
GEN V:
Black (TAKEN)
White
Bianca
Cheren
Side Series:
Wes (Colosseum) (TAKEN)
Micheal (Gale of Darkness)
Lunick (Pokemon Ranger)
Solana (Pokemon Ranger)