Enemy Sprite malfunction?

Hey everyone! Me again! So I've learned some new things and have been making GREAT progress! I have run into a few issues however o.o. Here's the thing. I have 4 side bosses I want to implement. one of which has alreaady been succesfully entered in. The others are Omega weapon, Kaiser Dragon, and my own custom boss.

Here's the thing. I don't want to get rid of any pre-existing enemies but don't mind getting rid of some Espers. I seem to run into an issue where when the sprite enters the battle it's all deformed. What do I do? what cana I replace? how do I fix this? I wouldlove some help. Any would be great! Thanx ahead of time!

Roy-Boy