Who is the "Ancient One"? How do I get him to challenge me?

This is referring to something Bison says in his ending. The line was not present in the Japanese version, it was something Capcom USA added. The truth is, there is no "Ancient One", I believe it was simply added to try and make players thing there was some kind of hidden character Bison could fight. Hidden characters in fighting games were becoming the "in" thing by 1993, such as Reptile in Mortal Kombat and Ryo Sakazaki in Fatal Fury Special. But there is no hidden character in Super Street Fighter II -Capcom USA just wanted people to think there was. The next game in the series, Super Street Fighter II Turbo, does have a hidden character you could challenge.


What is the reversal glitch with Zangief?

This glitch lets Zangief perform a reversal version of his Siberian suplex even if the opponent is on the opposite side of the screen. This only works on a revision of the game called "US 930911". If you do a reversal version of the move using the forward kick button, it should work, as shown in the example above -your opponent will magically warp to where Zangief is so he can throw them. This was fixed in all other versions of the game, I believe, including all the console ports.