Mitch is your friend in Pokémon Diamond 2 and Pearl 2.

On Route 231, the first route of your adventure, Mitch stops you and gives you a choice of 3 Pokémon. Either Turtwig, Chimchar, or Piplup. His signature Pokémon in this eventful battle is a Level 2 Aipom.

D2P2 VS Friend Mitch

Mitch comes from a rich family, which is painfully obvious at times.