Grotle evolves at level 32
To evolve your grotle into torterra, just level it up to Lv. 32. Get that?
Grotle evolves into a Torterra at level 32.
He evolves at level 32 in Pokemon platinum
LEVEL32
lv:32
Turtwig evolves into Grotle at level 18, then Grotle evolves into Torterra at level 32.
Turtwig evolves at level 18 into Grotle. Then Grotle evolves at level 32 into Torterra.
Turtwig evolves INTO Grotle at Level 18Grotle evloves INTO Torterra at Level 32
Level 33 and up on Pokemon battle arena
Level 18 = Grotle Level 32 = Torterra
A grotle evolves at level 36.
It evolves at Level 18, to Grotle, and then at Level 32, to torterra