[@WingsOfBronze]How come you aren't playing Bartz's mimicry the way it really is? Also, in Dissidia if that's what you're basing it on, he can take on whatever job classes from his game. His Blue Magic consisted of moves from enemies from his game and not from other characters. It just doesn't seem feasible to say you're going to copy every single characters' powers in existence when it's out of his character to do so. The copy ability requires the Blue Mage to take damage in order to gain the skill. If your character dies, he won't be revived unless one of the characters has a revival item and seeing as they are hard to get, why would you have your character risk his life?

You also don't need to give Sans an HP bar because he would be the only character in this game with one. As a GM, if I want a character to take damage, I just make them take damage (only if it is logical - some people think they're invincible), so you don't have to worry about that. I only said you can't make him have 1 HP because he could die any second if you do that.