All of the hidden characters have an ending, but it is just a message congratulating you for beating the game with a hidden fighter, so I haven't bothered listing them here. Special thanks to Ragey for the English translation of Norimaro's ending.

In the Japanese version, Dark Sakura, Shadow and Mech Zangief have actual endings instead of generic messages. To see English translations of these endings, go to this page.

Akuma
Bison
Blackheart
Captain America
Chun-Li
Cyclops
Dan
Dhalsim
Hulk
Ken
Norimaro
Omega Red
Ryu
Sakura
Shuma-Gorath
Spider-Man
Wolverine
Zangief