The summoned characters are Simba, Genie, Bambi, Dumbo, Tinker Bell, and Mushu. There are Journal entries for each of these characters. Four of the summoned characters use attacks, while the other two restore the party.

Attacks
Simba: Proud Roar hits all enemies on the area map.
Genie: Showtime hits multiple enemies with a variety of attacks.
Dumbo: Splash douses enemies in front of Dumbo.
Mushu: Fire Breath shoots fireballs at the enemy.

Restore
Tinker Bell: Heals the party and revives Sora from KO status once.
Bambi: Drops MP balls and various items.

Locations:

Simba, Bambi, Dumbo, and Mushu are acquired from summon gems. After you deliver the Old Book to Merlin, bring these gems to the Fairy Godmother. She will turn the gems into summons that Sora can call into battle. Here is a list of the 4 summon gems and where they are obtained.

Earthshine (Simba): Traverse Town Talk to Leon in the Secret Waterway.

Naturespark (Bambi): Hundred Acre Wood, Play Pooh's Hunny Hunt mini game once. You must find at least one Torn Page to open up this mini game. The Torn Page will turn into Naturespark.

Watergleam (Dumbo): Monstro, Find in treasure chest in Mouth. If you leave Monstro before getting Watergleam, you can go back later for it. Monstro appears randomly, so just keep trying until he shows up.

Fireglow (Mushu): Hollow Bastion, Defeat Maleficent (Dragon).

Genie joins your party after Sora seals the Agrabah keyhole.

Tinker Bell joins your party after Sora seals the Neverland keyhole.


Collect all 6 summons and talk to the Fairy Godmother to receive Donald's Lord Fortune weapon. Summons can only be used after a battle starts. First, select Magic on Sora's command menu, then Summon to access a list of the summons you have. Then you can choose the summon you want to use. Summoned characters will stay with Sora until their MP gauge reaches zero or they are dismissed. To stop using a summon, select the Magic command again, then use the Dismiss command.

Each summon can only be called once per battle. Sora must have the
Necessary amount of MP to call a summon. Also, there must be three Party members in battle, with no party members KO'd.

Sora is not allowed to use summons during the Olympus Coliseum
Competitions. Summons also cannot be used in Atlantica.

In Neverland, Sora is unable to summon while flying. Sora can start flying after the summon is called, but if Sora flies somewhere and Simba or Bambi cannot follow, they will leave the battle.