Thunder the pikachu. He's good-hearted, kind, caring, and loyal. He's the next Keyblade-weilder. He has a Keyblade called Heart of Fire. It can REALLY shoot fire from it.
Silver the wolf. He and Blaze was sent to find the next Keyblader, which is Thunder. They joined him and now they're on adventures together.
Blaze the rabbit. Same as Silver.
Shock the Pikachu. Same as Thunder. She has a Keyblade too called Holy.
Hydro the Oshawott. He's a friend of Thunder and Shock. He has a Keyblade too. Blood Sacrifice.
Nightmare the Darkrai. He's the main vallian in this story. He tired to take over Poke Hearts, like what's his name in KH 1.. or was that.. oh never mind.. You guys know what I mean..
Madusa the Purisian. She is an evil little princess, that think she's all that. Blah, blah, blah...
Kavak the wolf. He's black and he's an evil little asshole.