Turtwig

Turtwig is one of types of Pokemon. Their species is the 387th type of Pokemon. They were introduced in the Nintendo DS video game Pokemon Diamond and Pearl. Their name is a mixture of the words turtle and twig. In the game stated before, he is one of the three starter Pokemon that your character will have to choose, the other two include Chimchar and Piplup, the first being a fire Pokemon, and the latter being a water user.

As him name suggests, he looks much like a turtle, the twig part of the name refers to the plant springing out of his head. Different plants will grow on him as he evolves into different species. There are no differences between the male version and the female version.

Trainers
Other than you being able to train him yourself, Natane, one of the gym leaders, also uses one.

Evolution
Evolution occurs in almost every Pokemon in the game. The following is a list of Pokemon that the Turtwig will evolve into. Note that the latter Pokemon is the species that Hayashigame will evolve into, rather than Turtwig directly evolving into them.

Starter Pokemon
As stated above in the beggining paragraph, Turtwig is one of the starting Pokemon (which again, also includes Chimchar and Piplup). In every Pokemon game (or atleast in the main series), there is a grass type of starter Pokemon. The other grass type of starter Pokemon in the series includes, and in order, Bulbasaur, Chikorita, and Treecko.

Turtwig in the anime
Turtwig is the second Pokemon that Ash catches in Sinnoh. In the episode where Ash catches him, Team Rocket kidnaps Ash's Pikachu. Soon after they escaped in their balloon, it crashed. Noticing that the Pikachu was in trouble, Turtwig defended him against the team. Once Ash arrived, Turtwig thought falsely that they were trying to capture Pikachu, so Turtwig grabbed the tired pokemon and ran. Later on, the misunderstadings were forgiven, and at the end of the show, Turtwig joins Ash's team.