Pokémon Charmander? Kinda... sucky. Perhaps... Pokémon Burning Thunder? Because it's hack of Pokémon Yellow (thus the thunder part) and you get Cgarmander, which is fire, thus the burning part.
EDIT: I think I can get you some sprites... but I;'m not entirely sure.
By the way, I#m not really sure why I'm helping you with this hack. Usually a boring hack like this I would leave to die. Must be in a weird good-but-not-exactly-happy mood... how weird.
EDIT 2: Gary's Eevee evolves depending on what you do:
Lose against Gary in lab: Vaporeon
Win against Gary in Route 22 (If you didn't lose against Gary in lab): Jolteon
Skip/Lose Battle against Gary in Route 22 (If you didn't lose against Gary in lab): Flareon
Perhaps you should change it so it always evolves in to Vaporeon. Or change it to this:
Lose against Gary in lab: Jolteon
Win against Gary in Route 22 (If you didn't lose against Gary in lab): Vaporeon
Skip/Lose Battle against Gary in Route 22 (If you didn't lose against Gary in lab): Flareon
Of course, you could just leave it as it is.
EDIT 3: Found you some Charmander sprites, there not that good, but it's the sprite used in R/B, so what did you expect?