alright, this will work most of the time and its so simple... just play with blanka and keep doing his forward roll and crouch blocks... wait for the comp to jump in or take a break in fireballs and then nail'em... even if you trade hits, yours will be the more damaging... all it takes is patience and the ability to perform that move and you can get all 4 of the difficult arcade achievements...
balrog is esp easy as for him all you have to do is the electricity... sagat is the only one who will give you any trouble and hes not so bad as you can duck half of his fireballs, youve just gotta have better timing against him...
i just now beat the arcade for the first time by using blanka and ramped up the difficulty to 7 stars and lost my first round after 7 opponents(and it was really close)...
also, you can get the regular 'beat the arcade' achievement on any difficulty so id assume the hyper and perfect versions can as well...
beat the arcade, get the achievements and then just go have fun in quarter matches where people arent ALWAYS picking ehonda...

*note, im all about ken and ryu so it was a bit difficult mentally to use someone like blanka but its worth it to save the frustration...
