During the a match do the following to have diffen form of Ryu at your disposal. (Level 1 super meter is needed.)
Evil Ryu: Half-circle back Fierce Punch
Ryu as Ken: Half-circle back Medium Punch
Turn Back: Half-circle back Quick Punch
Choose Your Helper
To obtain the helper of you choice, you must always hold down start and then the designated buttons, just before selecting your second character.
Shadow
WP+MK+FP
Sentinel
MP+MK+FP
Storm
LP+LK+HP
She can be used up to 6 times.
Thor
LK+MP
He can be used up to 8 times.
Unknown Soldier
LP
He can be used up to 4 times.
Pure and Fur
LK
She can be used 5 times.
Anita
LP+MP+HP
She can be used 5 times.
Lou
MP
He can be used 8 times.
Rogue
LP+MP+HP+LK
She can be used 7 times.
Colossus
LP+MP+MK
He can be used 5 times.
Michelle Heart
LP+LK
She can be used 6 times.
King Arthur
LP+MP
He can be used 8 times.
Saki
HP
She can be used 7 times.
Ton-Pooh
LP+HP
She can be used 9 times
Iceman
MP+MK
He can be used 4 times.
Cyclops
LP+LK+MP
Magneto
LK+HP
He can be used 7 times
U.S. Agent
MK+HP
He can be used 5 times.
Psylock
MK
She can be used 5 times.
Devilot
MP+HP
Can be used 5 times.
Juggernaut
LP+MK
He can be used 3 times
Onslaught's moves
Sentinel Attack (small form): Any Attack.
Dashing Attack (small form): Down, Down/Forward, Forward + any Kick.
Magnetic Tempest (small form): Down, Down/Forward, Forward + any Punch.
Unblockable Prison (small form): Forward, Down, Down/Forward + any Punch.
Teleport (small form): Down, Down/Back, Back + any Kick.
Magnetic Shockwave (small form): Down, Down/Forward, Forward + 2 Kicks.
Mega Optic Blast (small form): Down, Down/Forward, Forward + 2 Punches.
Hand Crush (large form): Any Punch.
Sentinel Attack (large form): Any Kick.
Hand Drill (large form): Down, Down/Forward, Forward + any Kick (when on the ground).
Laser (large form): Down, Down/Forward, Forward + any Punch.
Unblockable Prison (large form): Forward, Down, Down/Forward + any Punch.
Move (large form): Rather than going forward and back like in his small form, he now can go up and down in the air.
Laser beam (large form): Down, Down/Forward, Forward + 2 Punches (same as the ordinary laser, but he fires five of them).
Permanent Secret Characters
If you can beat any of the secret characters and save the data into your VMS, you can use that character without reentering the code.
Play as Evil Zangief
Choose Zangief. Do a 1/2 circle back, quick kick, and he will flash and turn into his evil form.
Play as Gold WarMachine
At the character select screen, move the cursor to Zangief, then press L, L, D, D, R, R, D, D, L, L, U, U, U, U, R, R, L, L, D, D, D, D, R, R, U, U, L, L, D, D, R, R, U, U, U, U, U. A Golden version of WarMachine should apear above Zangief.
Play as Hyper Venom
To play as hyper venom. Put the cursor on Chun-li and press: R, D, D, D, D, L, U, U, U, U, R, R, D, D, L, L, D, D, R, R, U, U, U, U, L, L, U.
Pressing kick to select him will give you ice blue venom, punch will give you blood red venom.
As with all secret characters in the home version, you only have to enter the code once. After it is entered go to Chun-li and press Up to select Hyper Venom. Once the Dreamcast is turned off then on again, you will have to reenter the code.
To play as Onslaught, successfully defeat each of the secret characters in arcade mode, saving them to a memory card. Once al characters have been enabled, the Onslaught mode will open up on the title screen, enabling player 1 to play Onslaught against player 2 or the CPU.
Play as Orange Hulk
Highlight Chun_li then press Right, Right, Down, Down, left, Left, Right, Right, Down, Down, Left, Left, Up four times, Down, Down, Right, Right, Up, Up, Down four times, Up four times, Left, Up. Orange Hulk appears above Ryu.
Play as Roll
Highlight Zangief, then press L(2), D(2), R(2), D(2), L(2), U, R, U(2), R(2).
To have Sentinal as your special partner, simultaneously press Medium Punch, Medium Kick and Hard Punch after choosing your tag team.
Snap Shot
Press START to pause game, then HOLD Y and press X. This will enable you to see the characters and backgrounds clearly without the tinted screen.
Swap Starting Character
Hold all three punch buttons at the Vs. screen to swap who starts match first (i.e. if you chose Ryu then Chun-Li, you would start the match with Chun-Li, and vice versa).