Your best bet is to use someone with a rapid move, like E. Honda's punches, Chun-Li's Kicks, or Blanka's electrifying move ( See Moves List at bottom for help. )
Explanation of Bonus Rounds...
Every time you beat 3 fighters in the arcade
mode, you will have to do a bonus game.
Destroy the car by damaging the right side of it first, then jump over to the car's left side and attack that enough times to destroy it for good. Destroy the car before the timer runs out to complete this bonus game.
Barrels are dropping down overhead. Destroy them by attacking them. Destroy them all to complete this bonus game.
BARRELS ON FIRE
Easy... Smash all the barrels when they aren't on fire. Destroy them all to complete this bonus game.