This is the first time I've customized Sonic Boom characters on Blender, but unfortunately, the skeletons aren't perfect, so maybe if you deal with an imperfect skeleton? (I feel too tedious or lazy to concentrate on Blender to create the perfect skeletons as Nightbane does.)
Level 1: Knuckles in the Costume Shop
Level 2: Tails in the Costume Shop
Level 3: Amy in the Costume Shop
Level 4: Sticks in the Costume Shop
Level 5: Sonic in the Costume Shop
Sonic





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Enjoy!?