99 Puppies

The 99 Puppies make an appearance as a side quest in Kingdom Hearts, in which Sora is given the task of finding them in various worlds. It is not a requirement to find all of the puppies in Kingdom Hearts, but doing so yields various rewards, which includes unlocking the secret ending on normal difficulty, an Aero upgrade, as well as a full Gummi Block collection.

Kingdom Hearts
The puppies originally resided in a currently unnamed world in the Kingdom Hearts universe, raised by two adult dalmatians, Pongo and Perdita. At some point, the dalmatians' world was destroyed and the puppies were separated from their parents. During the chaos of their world's destruction, the puppies were somehow bundled into groups of three, and were separated across the various worlds of the Kingdom Hearts universe.

During his journey, Sora finds and frees each group of puppies, sending them to Traverse Town, where Pongo and Perdita had found a temporary home.

Traverse Town

 * 1, 2, 3: Mystical House, on the island across from Merlin's house. Glide can be used to fly over to the rock, though Mermaid Kick can also be used to "jump" onto it.
 * 4, 5, 6: Alleyway, behind a wall of crates. Use Trinity Charge to break through.
 * 7, 8, 9: Item Workshop. Use Trinity Ladder to get in.
 * 10, 11, 12: Secret Waterway. Use Trinity Charge to break through the sewer gate.

Wonderland

 * 13, 14, 15: Queen's Castle, on a hedge. Reachable by going through a hidden exit from Lotus Forest.
 * 16, 17, 18: Lotus Forest, on one of the raised lilypads.
 * 19, 20, 21: Tea Party Garden, on the roof. High Jump and Glide are required.
 * 58, 59, 60: Queen's Castle, on the right hand hedge. High Jump is required.

Olympus Coliseum

 * 22, 23, 24: Use Trinity Jump under the right hand statue at the Coliseum Gates

Deep Jungle

 * 25, 26, 27: On the last islet in the marsh in Hippos' Lagoon. Glide recommended but not needed.
 * 28, 29, 30: In the Vines 2 area, reached by climbing the ivy in the marsh.
 * 31, 32, 33: Blue Trinity mark in Climbing Trees area.
 * 34, 35, 36: Blue Trinity mark in the Camp Area.

Agrabah

 * 37, 38, 39: In Aladdin's House.
 * 46, 47, 48: Palace Gates; High Jump is required.
 * 49, 50, 51: Cave of Wonders entrance; High Jump and Glide required.
 * 52, 53, 54: Treasure Room in the Cave of Wonders.

Halloween Town

 * 40, 41, 42: Bridge area, near the entrance of Oogie's Manor. If this chest is not opened before defeating Oogie's Manor, it cannot be collected. In the North American and Final Mix versions, this chest can be found after you destroy Oogie's Manor.
 * 64, 65, 66: After defeating Oogie's Manor, go to Moonlight Hill and search for a secret doorway. Go in the newly accessible door to find the chest.
 * 67, 68, 69: In Jack's House, check under the staircase.
 * 70, 71, 72: Guillotine Square, use Glide to reach the mouth of a grey pumpkin-like tower.

Monstro

 * 55, 56, 57: In Chamber 3.
 * 73, 74, 75: In Mouth, on top of debris. Requires High Jump to reach.
 * 76, 77, 78: In Chamber 3, on a platform that can be reached by a barrel.
 * 79, 80, 81: In Chamber 5, on a barrel on one of the higher platforms in the area.

Neverland

 * 43, 44, 45: In a corner of the Clock Tower.
 * 82, 83, 84: When flying, on a beam in the ship's Hold.
 * 85, 86, 87: Trinity Push in the ship's Hold.
 * 88, 89, 90: Chest in the Captain's Cabin, after AntiSora's battle.

Hollow Bastion

 * 61, 62, 63: In the Grand Hall on a left ledge near the Keyhole, during Sora's second visit.
 * 91, 92, 93: At the bottom of Rising Falls, on top of the water, by the rocks.
 * 94, 95, 96: Cast Gravity to lower the floating platform in the Castle Gates.
 * 97, 98, 99: Cast Gravity to lower the floating platform in the High Tower.

Rewards

 * 12 Puppies: Curaga-G;
 * 21 Puppies: Firaga-G;
 * 30 Puppies: Thundara-G;
 * 42 Puppies: Mythril Shard;
 * 51 Puppies: Torn Page, Mythril;
 * 60 Puppies: Megalixir;
 * 72 Puppies: Orichalcum;
 * 81 Puppies: Ultima-G;
 * 90 Puppies: Ribbon;
 * 99 Puppies: Every Gummi Block and Aero upgrade.

Appearance
The most notable thing about these dalmatians is that they wear different colored collars to signify their genders; females wear blue collars, where as the males' collars are red.

Puppy No. 5 is actually Patch, and Lucky is the puppy who sits in front of the television set.

Personality
As there are ninety-nine of them, the puppies have varied personalities. Their common traits include hyperactive, child-like behavior. They all enjoy watching television, but are all very well-disciplined by their parents. In one of the rooms in the Dalmatian's House, one puppy will happily follow Sora through the room, proving they seem to like Sora.

Origin
The 99 Puppies are based on their appearance in Walt Disney's 1961 film One Hundred and One Dalmatians, which was in turn based on the 1956 book The Hundred and One Dalmatians by Dodie Smith. The puppies' main characteristics, along with some of their names, remained for the transition from book to film. However, the film added two dalmatian pups to the book's original count of ninety-seven; in the original book, two additional adult dalmatians round off the total one-hundred-and-one, as the four adults were merged into Pongo and Perdita for the film.