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Character specific strategies (Playing as Ryu):
Against E.Honda: Not much to say here. He uses his karate chop maneuver as an anti-air. Use Hurricane Kick and Hadouken to soften him up. Throw when possible. When he's dizzy nail him with a Shoryuken if you can. If not, throw him. Honda isn't hard.
Against Blanka: Don't jump too much. His jump kick has higher priority than yours. He also uses his flip kick to knock you out of the air. Hurricane Kick works well here. Don't spam Hadouken. He'll just jump it. Try to trap him in a corner. If he blocks jump away.
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To beat zangief, stand at the left edge of the map, keep jumping and pressing C. It'll peel down his health. To beat balrog, if playing as Ryu or Ken, keep yourself crouched, and spam light kick.