Where do you get areo on Kingdom Hearts

If you have already finished Deep Jungle,after talking to Leon(Secret place at the Lobby with water next to Dalmatian´s house,you will have to use Red Trinity after completing Deep Jungle),Merlin,The Fairy Godmother and Riku(in the 3rd District),return to the second district,then to Gizmo shop,get outta there,climb up the stairs at the wall,use the Trinity move with Donald and Goofy,Ring the bell 3(three) times.The picture at the fountain will change also three times.After the third time,get close to the fountain and defeat the Boss(Opposite Armor).After that,you will receive the Aero magic ability.It doesn´t damage enemies,but if you want to damage them,you MUST upgrade this spell by

Aerora:Open the chest in Neverland on Captain Hook´s ship in the room sealed by the Yellow Trinity Mark.Power equals Max MP of target*2+6.

Aeroga(Greatly damages enemies):Find all the 99 puppies from Pongo and Perdita and talk to them.