Piplup,Chimchar,Turtwig
Turtwig, Chimchar, and Piplup.
Turtwig. By far. It crushes another of the three staters with its types.
Ponyta evolves into Rapidash, starting at level 40.
Croagunk will attempt to evolve starting at Level 37.
It evolves via level starting at level 16.
Omanyte evolves into Omastar starting at level 40.
sorry but you have to get another diamond/pearl/platinum game and trade the other starters from there.
There is no rental Pokemon in in Pokemon platinum
You cant get Pokemon from Pokemon ranger to platinum!
how to get a togepi in Pokemon platinum
There is no grunt that you can give a Pokemon to in Pokemon platinum.
buy the Pokemon platinum book