I have a few constructive criticisms for Goku..please don't hate me for them
B- I think it's a little too large in scale for a neutral B attack, and it looks a little odd, because the fact that the end of it leaves his palms, but it's supposed to stay there. Like, the rectangular tail shouldn't completely leave his hand, like this: <--------------------------------O
That's not a perfect diagram...but here's what yours does: < -------------------O
Down B- I think this should be completely reconstructed, with a whole new idea. It seems futile in battle, because it would throw you off. Ideas: Solar Flare (possibly as a counter move, like you would press down B, he would place his 2 fingers on his head, and if he were attacked, he would use Solar Flare, and the opponent would walk backwards when they press forward, ect. Or, an Aura Charge that causes you to slowly take damage but when done charging leads to Kaioken/Super Saiyan.
Up B- Seeing that it's unique in that fact that it doesn't also damage characters whilst doing it, I think the start animation (where he touches his head) should be faster. Also, he can teleport inside of objects. Example: Stand on the ground at any stage, and press up B, then hold down..so...you may want to fix that..I still want him to be able to teleport past things, like on Corneria, being able to teleport past the air wing thing to get to the other side, ect.