depends on what exactly you want to add where
you can easily add animations to the animation tab by increasing maximum, and since 1.4.0 you can right-click the new animation numbers to use old picture data (MV-compatible) instead of just particle effects.
if you want to know about other forms of animations you have to tell us which animations.
SIGH its so hard to convince my friend that making a game for fun and making one to sell takes different planning. I don't care about weird bothersome ways of doing things in a game made for fun, but when you are planning to market it, there is some stuff that you just have to streamline or cut out.