A question on Summon Gems...

The Fairy Godmother said that the Summon Gems were characters whose hearts were strong enough to survive when their world was consumed by darkness. So how exactly does Mushu show up as a summon when Mulan's world is still there? If his world came back when Ansem was defeated, does that mean that he will no longer be available as a summon in KHII?

mulan's world WAS destoryed, which is why mushu's gem came to be, but i f he were to become a summon, he would be like a 'favour' like how tinkerbell and genie were to sora...they don't necessarily need to be in gem form

Well, at least that gives them an excuse to make you reacquire the summons all over again.