Hippopressor

Hippopressor is a Mechaniloid boss from Mega Man X: Command Mission that attacks X and Zero, but is destroyed by them.

While this Mechaniloid might have been ordered by Epsilon to destroy X and Zero, it could be just a Maverick that happened to be in the vicinity and attacked the pair.

Strategy
Hippopressor is one enemy, but it can be attacked it in two areas: The shark missile and Hippopressor itself.

When Hippopressor is attacked, it takes damage, and will lose its head after enough damage is dealt. This reveals the particle cannon which fires of a powerful attack on either X or Zero.

If the shark missile is attacked, it gets damage, but Hippopressor doesn't. However destroying Hippopressor's shark missile cancels the use of it. If it is used though, it deals 500 damage (half of the character's health at the time) to either X or Zero.

Abilities

 * Hipporesser can fire the shark missile (mentioned earlier) and deal 500 damage to X or Zero.
 * Before breaking Hippopressor's head, it can fire a machine gun hidden in it's mouth which deals a little damage (around 17 for each hit) six times.
 * After breaking Hippopressor's head and revealing the particle cannon it can fire it at X or Zero dealing some damage (around the high 100s) to them.