I just beat the original arcade version of Street Fighter Alpha 3 with Blanka! I even scored a perfect on M. Bison in the last round!
(It was default difficulty, in case you are wondering.
Blanka's strong forward roll is so useful. It's so fast and has so little start up time, even the hardest AI opponents have a hard time preparing themselves for it. ...Regardless, I still know better to spam that move against a Projectile user like Ryu or Chun-Li. I also know only to use Blanka's arcing roll only if I'm in range, or else I could be severely punished for it.
...Actually, I'm either REALLY good with Blanka, or AI opponents just do not know how to deal with a Blanka user.)