You cannot find a Grotle in Pokemon Platinum. You must start out with a Turtwig and then evolve it or get a Grotle via trading.
Get more Pokemon and make grotle a torterra
first you will need a grotle lv it up to lv.25 then talk to pr.rowan then he will give it to you (only Pokemon platinum)
Grotle, along with its evolutions and pre-evolutions are not available in SoulSilver. You can only get it by evolving the Turtwig you choose in Diamond, Pearl, or Platinum.
grotle learns mega drain at level 27
lv:32
LEVEL32
To evolve your grotle into torterra, just level it up to Lv. 32. Get that?
He evolves at level 32 in Pokemon platinum
you find grotle in sunshore cityyo... where do you find it in sunshore city?d******
A trainer on the celestic town side of route 210
breed a toterra or grotle, then walk around with the egg until it hatches
Grotle is a Grass type pokemon.