how to change the skill "possess"

you know i think metroid quest changed possess into storm if i'm not mistaken.. haven't tested it though

maybe he changed it to a fight command.. and used a relic to be casting it?

I don't remember exactly what he changed possess in...I think it was Cecil's special ability once he become a paladin if I'm not mistaken..He probably tweaked the command to make it behave to something closer to shock or something similar. Then he added a custom animation...I played "The eternal crystals" too long ago to remember exactly.

You could always check his ROM in Bank C2 where possess is suppose to be and check the assembly changes he made with the help of the C2 dissasembly...This or run an IPS report to see exactly the bytes changed in C2 but that won't tell you what the changes are, it will only tell you where he did the changes.