Switch characters during match:
Use the following to switch between characters in the middle of the game. For
example if you choose Cable, Ryu, then Ken, but later in the second stage you want
Ryu to appear first -- Hold L for the second character and R for the third character at
the versus screen. 

Change fighter order:
Selecting your three fighters. Then, hold X + Y + L at the versus screen to change their
order. 

Alternate costumes:
Highlight a fighter, then press Y or A at the character selection screen. 

Multiple character selection:
Unlock every costume and character to chose multiple people. For example, player
one could chose three Charlie's and the other player could also chose three Charlie's.

Cheaper hidden fighters:
Exit and enter the shop screen until the price of the hidden fighters are lower.

Defeating Abyss:
Select Cable. For Abyss' first form, just block his attacks and then press Y to shoot.
Repeat this until he dies. For his second form, distance yourself far as possible and
press Y to shoot. Repeat until he dies. For his third form, just use Cables Hyper Viper.
It takes off 90-95% of his life in one blast and will be a 115-130 hit combo. Then, just
hit him once or twice with any attack to defeat him.

Hint: Unlimited chain supers:
Note: This trick only works in training mode. Set the combo gauge to infinity in the
training menu. Then, start a super and start another one. This can be done an
unlimited amount of times. This works best with characters who have beam supers.

Hint: Get points without playing:
You can get ten points a minute if you go to training mode, choose a character and
opponent, then leave the game on for about five hours. Note: Do not pause the game.