Chimchar

Chimchar is a small brown-furred chimpanzee and the Fire-type Starter Pokémon of the Generation IV games, Pokémon Diamond and Pearl Versions and Pokémon Platinum Version. It evolves into Monferno at level 14 and then Infernape at level 36.

The flames on their rears are produced by burning gas in their stomachs. Chimchar also has a swirl-like symbol on the chest. The flames do not go out in the rain, and, unlike the tail flames of Charmander, those of Chimchar go out when they go to sleep.

Pokémon the Series: Diamond and Pearl
In the Pokémon anime, Chimchar makes its debut in Pokémon the Series: Diamond and Pearl's debut episode, "Following a Maiden Voyage!". Like in the games, Chimchar is shown as one of the three Sinnoh starter Pokémon in Professor Rowan's lab.

In earlier episodes, Paul owns a different Chimchar from the one in Professor Rowan's lab. In a later episode, Paul releases the Chimchar, who then accepts Ash's offer to join his team. When captured by Ash, the Chimchar becomes Ash's Chimchar.

Etymology
The name Chimchar is a portmanteau of the English words "chimpanzee" and "char". Its Japanese name Hikozaru may be a portmanteau of the Japanese words for fire (火), child (子) and monkey (猿). The pronunciation of "zaru" instead of "saru" is a phonetic shift that occurs when "saru" is used in a compound.

Reveal
Chimchar was revealed on August 5, 2006 along with the other Starter Pokémon of Pokémon Diamond and Pearl Versions, Piplup and Turtwig. Its English name was first officially confirmed in Nintendo Power's April 2007 (volume 214) issue.