Charvee

Charvee is a Fire-type Pokémon Fusion. It is a fusion of Charm

If the player's Rival, Brendan or May, chooses Charmander as his or her starter, he or she will fuse it into Charvee, presumably with Bill's help. He/she will first use it when encountered on Route 6. When encountered in Pallet Town, it's evolved into Chareon.

Other Charvee
A Team Magma grunt under Lavender Town will use a Charvee they created with the stolen fusion machine (or possibly with the duplicate).

A trader named Chester in Ecruteak City will trade the player a Charvee in exchange for a Typhlosion if the player does not own one already.

Pokédex Entry
"It must be careful not to set its thick fur on fire with its tail."

Locations

 * Sea Cottage (Fuse Charmeleon with Eevee)
 * Ecruteak City (Trade for Typhlosion)