Pony Fantasy VI Remake

I'm not too sure but sometimes a sprite graphic being placed over an original one needs to have some part of the sprite being in the same place as the last one, which yours basically is, except for the top left wing portion. It has something to do with a graphics buffer trying to still read the original sprite that is housed in its particular mould, I believe. To test if this is the issue, try placing some pixel in the top left (and possibly right), where Bahamut's wing extended to, and see if it shows up then in battle.

That viser can be removed yes, it's the special animation for that summon, index 3...I think.