Dumb questions from a noob

Eh, I'll appreciate if you guys could help me by answering these super noobish questions that you probably have answered so many times already but that never hurts to repeat, never hurts to repeat, never hurts to repeat.

1. It is possible to edit animations of events, for example, I don't know, when for example when the Soldiers clean Kefka's boots, make it so they don't do it and instead just continue walking? If it is, poot guide on how to do so here.

2. Which sprites exactly can be changed and which can't? For example, can I edit the sprite of certain weapons, of the GP sprite of GP Rain?

3. How do we change names to skills, like Blitz, Tools, Slot, etc.?

4. I guess it is, but is it possible to have Shadow (who in my hack is replaced with someone else) not to have Interceptor protecting him? Can I actually make it so that there's no interceptor following Shadow in his over world sprite at all? If it is, poot guide on how to do so here.

I'll highly appreciate any help you guys can give me, and I hope not to bore you guys a lot!