The complete Pokemon Diamond and Pearl pokedex, part 1

Pokémon Name: Grotle
Type: Grass
Classification: Tree Grove
Pokédex Number: 002 Sinnoh / 388 National
Ability: Overgrow - Increases the strength of Grass-type attacks when HP is low
Dream World ability: Shell Armor – not affected by critical hits
Useful Attacks: Mega Drain

Location Found:

Evolved from Turtwig
HG/SS: Trade from D/P/P
B/W: Poke Transfer

Trading in his adorable overbite for an intimidating grimace, Turtwig evolves into this walking shrubbery. There isn't anything particularly special about Grotle – he's still a pure Grass-type, and naturally has better stats than Turtwig. Being a tortoise and growing as quickly as he is, it's no surprise that Grotle is relatively slower than the other starters at this phase of his development, but he's got a better variety of moves than the others.

Evolves to Torterra at Level 32.