Turtwig evolves in Grotle at level 18. Grotle evolves into Torterra at level 32. Torterra evolves into *SUPER-MEGA-AWESOME-INDESTRUCTIBLE-(insert cool ending here) at level 46. Nah, just kidding. Torterra doesn't evolve. Sorry if i got your hopes up.
BTW you shouldn't have chosen Tutwig.
You should have chosen Piplup.
18 then 32
level 18
Pachirisu does not evolve :(
Level 30.
level 40
18 then 32
To evolve turtwig [pokemon pearl/diamond] level it up to level 16.
Level 18
level 18
level 18
Turtwig evolves into Grotle at level 18, then Torterra at level 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.
Level 18 = Grotle Level 32 = Torterra
piplup evolves at lv 16 chimchar evolves at lv 14 and turtwig evolves atl lv 18
It will evolve at level 48
it will evolve at level 21