Yang (Lilo & Stitch)

Experiment 502, later nicknamed "Yang", is a lizard-like creature with a literal hot temper; his specialty is to fire projectiles of hot lava from his volcano-like proturions from his back. It is stated that if he come into physical contact with his counterpart a catastrophic explosion will occur. However when this occurred, the two worked together and instead they created a new landmass - specifically an island.

Trivia

 * His name is derived from the concept of yin and yang.