8-on-8 Endurance Match
At the title screen, higlight "Start", then Hold L + R and press Start. In this mode you can randomly select your character by pressing Up + Start.
Kool Stuff Menu
At the title screen, press Right, Up, B, B, A, Down, Up, B, Down, Up, B.
Kooler Stuff Menu
At the title screen, press Up, B, A, Left, Down, Y.
Play as Human Smoke
Select Robo-Smoke at the character select screen. Before the match starts, hold Left + High Punch + High Kick + Block + Run. Smoke will explode into his human form.
Scott's Stuff Menu
At the title screen, press B, A, Down, Down, Left, A, X, B, A, B, Y.
At the title screen, hold L + R and press Start. To select a random team, press Up + Start.
Enter the Tournament Mode code as described above. Press Up + Start for a random team. If one of the boxes is a question mark, that fighter will be a screwed-up version of Sheeva and the game will start doing strange things, and may lock up.
At the title screen, press Left, Down, Y, Y.