Balrog is a boxer... He boxes (of course) and therefore he uses his fists only (obviously). He's a fast charge character with good close-range attacks and brute force, but he eventually struggles against characters with mid-range or high-range beams, specially if the opponent can spam those.
Along with Juli and Juni, he was originally a secret character who, in the arcade runs, is the semi-final boss for some characters and has no story of his own in his arcade run so it's just M. Bison's bosses, cutscenes and ending. He has a slightly different version for his CPU which can't be normally accessed.
In arcades, the way to unlock all of them are:
Via waiting for a bunch of days (which you can't replicate on emulation). The game rewards you for that, yeah.
Go to the Test Menu, select the Input test and do the following command: LP LP > LK HK (Shun Goku Satsu command, funny!), Start + LK (exit command). A message will pop up if done correctly!
In order to select him, you will have to:
Highlight Karin (for ~3 secs.), highlight a Random Box, hold Start and press any button (You usually get a random character with a different -ISM depending on which button you hit between Low, Mid and High sets of Punches/Kicks)















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