Normal- Snubbull
Fire- Tie between Charizard, Cyndaquil, Arcanine & A few others
Water- Tie Between Lapras, Squirtle, Oshawott & Totodile
Electric-Pikachu
Grass- Tie Between Bulbasaur, Treeco, Shaymin and Snivy
Ice- Glaceon
Fighting- Tie between Gallade, Machamp, Hitmontop, Hitmonchan, Hitmonlee, Monferno, Infernape, Scraggy, Scrafty, Riolu, Lucario, Blaziken and Meloetta ( Post Form Change )
Poison- No faves
Ground- Diglett
Flying-Pidgeot
Physic- Tie between Mewtwo, Mew and Espeon
Bug- Tie between Scizor, Beedrill and Buterfree
Rock- Nosepass
Ghost- Tie between Gengar, Litwick, Haunter, Chandeleur and Rotom
Dragon- Tie between Dragonite, Dratini, Dragonaire, Rayquaza, and a few others
Dark- Tie between Weavile, Darkrai, Purloin, Zorua, Murkrow, Cacturne, Krokorok , and Krokodile
Steel- Tie Between Steelix, Registeel, Jirachi, Dialga, Magnezone,
Escavalier, Ferroseed , Ferrothorn, and Cobalion
( Some typings verified from what bulbapedia claims )