You get one as your starter. It is not a wild Pokemon. If you chose another starter you may have to trade with one of your friends.
Snivy, Tepig and Oshawott.
Tepig
Tepig
Sorry, you can not get tepig in pokemon diamond version because diamond is a 4th generation game and tepig is a 5th generation pokemon. Get black/white!
theyre starter pokemon, you cant find them. you pick one of those three when you start your game
tepig, oshawott, and snivy.
pignite.
The starter Pokemon are Snivy, Tepig, and Oshawott.
Tepig
pignite
The Starter Pokémon in Pokémon Black 2 and Pokémon White 2 are Oshawott, Tepig and Snivy.
The first Pokemon is Snivy, Tepig. Oshawott.