QUARTER CIRCLE FORWARD + ATTACK
Similar to her SSF4 Thunder Knuckles, they are a key component to starting her combos, though it works a bit differently in MVC3. The Medium version is the one you typically want to use in combos.
The EX version causes a crumple state, and can be canceled from the Medium version. Keep in mind the EX version uses one bar of meter to perform.
You can feint Thunder Knuckles by inputting either Light Medium Hard and quickly pressing S.
QUARTER CIRCLE BACK + ATTACK
The Burning Kick is a tricky attack in this game in that it works as a cross-up and also hits overhead. The EX version is useful within combos as it is multi-hit and will leave the opponent in a juggle state.
FORWARD, DOWN, DOWN-FORWARD + ATTACK
C. Viper's Seismic Hammers are more used within combos rather than t control space. Use the Light version as an OTG and follow up with her Burst Time Hyper Combo.
L + S
Hold down Light and Special and C. Viper will be able to absorb any incoming attack at the expense of her life. Once it hits the opponent they will end up in a crumple state, unable to block. Holding down the Focus Attack for the entire duration will make it unblockable, just like in SSF4.
Direct - Tilt Up
Shot - Tilt Down
Direct - Front
BURST TIME (LEVEL ONE)
QUARTER CIRCLE BACK + ATTACK X 2
This is C. Viper's more useful Hyper Combo in that you will find a number of different opportunities to use it. After using Light Seismic Hammer as an OTG attack, follow up with this Hyper Combo for added damage. It also connects after a successful Air Throw.
EMERGENCY COMBINATION (LEVEL ONE)
QUARTER CIRCLE FORWARD + ATTACK X 2
C. Viper's Super Combo from Street Fighter 4. Not nearly as useful as Burst Time but can still be effective within combos.
BURNING DANCE (LEVEL THREE)
FORWARD, DOWN, DOWN-FORWARD + ATTACK X 2
C. Viper's Level Three is very powerful and moves fairly far across the screen making it great for punishing wiffed attacks. Like other Level Three's, it is invincible as well.
Air Throw, Land, Dash Forward, Burst Time
Damage: 266, 000
Crouching L, Crouching M, Crouching H, S, Cancel First hit into Medium Thunder Knuckle, EX Thunder Knuckle, Crouching L, Crouching M Crouching H, S, Super Jump, M, M, H, EX Burning Kick, Land, M, M, H, S, Super Jump, M, M, H, S, Land, Light Seismic Hammer, Burst Time
Damage: 763, 800
Crouching L, Crouching M, Crouching H, S, Cancel First hit into Medium Thunder Knuckle, EX Thunder Knuckle, Crouching L, Crouching M Crouching H, S, Super Jump, M, M, H, Jump, M, M, H EX Burning Kick, Land, Viper Full Throttle
Damage: 927, 400