Bison doesn't have any new moves. And yes, you have to press start to get his new color, for some reason. He is the only character in the game that you have to do that for.
(B (charge) F+P)
Using his psycho power, Bison launches himself straight at the opponent. They will be engulfed in blue flames if they are hit.
(B (charge) F+K
A fast kick strike which can do two hits.
(D (charge) U+K, P)
Bison will jump up and attempt to stomp on the opponent's head. Press any punch button and hold the direction toward the opponent to do an additional attack after the stomp.
STRONG & FIERCE PUNCH
Bison tosses the opponent.
3 HIT COMBO
Jumping forwards roundhouse kick > standing jab punch > fierce psycho crusher
5 HIT COMBO
Crouching jab punch > crouching jab punch > standing jab punch > forward knee press