Still holding the all 3 buttons, go and select Vega with another button ... Balrog is unique in that he's the only character in Alpha 3 who can taunt infinitely. If you keep holding the taunt ...

Press Start once (for Dhalsim, Ken, Ryu, Sagat, Vega and Zangief) for their Super Street Fighter 2 versions. Press Start 2x for Chun-Li. Note that all characters ... Zero 2'/SF Alpha 2 Gold.