Incentas

Incentas was a boss in the game Mega Man X: Command Mission. He was able to switch elemental properties when the situation called for it.

X and his allies went to his mine looking for Supra Force Metal. It was actually a trap. Once they reached the lab, Incentas barred the door behind them, trapping them inside. After a strenuous fight, Incentas set off the self-destruct mechanism for the lab. He was about to teleport out when Spider tackled him from the side. Pushing him into the door, Spider seemingly "sacrificed" himself so X could escape. Incentas was obliterated in the resulting explosion.

As Incentas does not appear for very long, his personality is not expanded upon. However, it is a reasonable assumption that he thinks highly of himself. This may stem from him actually being a genius that knows quite a bit about Supra Force Metal since his ally in the same dungeon, Shadow, was using them and it is possible that Incentas was as well.

Different Versions
Fire: Incentas is Red and Green with a body of Fire. Ice: Incentas is Blue and Purple with a body of water dancing. Thunder: Incentas is Yellow and Sky Blue with a body of lightning.