Street Fighter Alpha 3 Upper is the title for the GameBoy Advance version of the game, released in 2002. It has all the characters from the Playstation port, but also adds 3 bonus characters from Capcom Vs. SNK 2: Yun, Eagle and Maki. Due to the lack of memory, a lot of stuff had to be cut from this version. There aren't anywhere near as many stages (all the Final Fight characters have lost theirs), there are no individual endings any more, there are only a few music tracks, much less character speech and more. The other major problem is the poor control scheme due to the GBA being a four button system whilst Street Fighter is a six button game.
Maki's story is that she's looking for Guy. She wants to defeat him so she can become the successor to the Bushin style. She has all of her moves from Capcom Vs. SNK 2, but her voice has been cut to just a generic female grunt used by many of the other women in the game.
In 2006, Capcom released Street Fighter Alpha 3 Max for the Playstation Portable. This was an updated version of the GBA version, only now with arcade perfect graphics, sound and the endings for everyone had been restored. Maki now had her own proper ending. The control issues were still present with this version however, mainly due to the PSP's terrible D-pad.