1. There's a list somewhere about what the Mushroom wants, but I could try to remember some of it now.
When a Mushroom shivers, you have to cast fire on it.
When it waves you towards it in a ''Come on.'' way I think you have to cast blizzard.
When it has a yellow orb above it's head, you have to cast thunder.
When it hovers above the ground(in mid-air), you have to cast gravity.
When it's lying on the ground, cast cure.
And at last(I think), when it spins around you have to cast aero on it.
I can't remember if there's more magics, a while since I played KH I.
2. I didn't understand this question... :mellow:
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I used to be Keyblade Master Sora.