There is no way to parry in Street Fighter Alpha 3 unless it is a character specific skill.
There are 2 ways to unlock Evil Ryu in Street Fighter Alpha 3.
Download the official Street Fighter Alpha 3 ROM in the (USA) version for the Game Boy Advance handheld consoles. To fully utilize a GBA ROM game, use our Cheats, Rom Hacks and GBA Roms sections. You can open the Street Fighter Alpha 3 ROM or GBA file by Installing VisualBoyAdvance on Windows, MAC, Linux, Android or IOS/iphone.
Street Fighter Alpha 3, released as Street Fighter Zero 3[a] in Japan, Asia, South America, and Oceania, is a 2D fighting game originally released by Capcom for the arcade in 1998. It is the third and final installment in the Street Fighter Alpha sub-series, which serves as a sequel to Street Fighter Alpha 2, and ran on the same CP System II hardware as previous Alpha games.
The game was produced after the Street Fighter III sub-series has started, being released after 2nd Impact, but before 3rd Strike. Alpha 3 further expanded the playable fighter roster from Street Fighter Alpha 2 and added new features such as selectable fighting styles called “isms”.
Alpha 3 has also been released on a variety of home platforms starting with the PlayStation port in 1998, which added an exclusive World Tour mode and brought back even more characters, with further versions on the Sega Saturn, Dreamcast, Game Boy Advance and PlayStation Portable.
Street Fighter Alpha 3
Japan: September 27, 2002
Game Boy Advance
[Total: 4 Average: 3.8]