At the indicated menu (brackets) enter the following codes to unlock the corresponding effect.

Unlock ALL Characters:
(Character Change menu) Right, Left, Left, Right, Up, Up, Up, Start.

Unlocks Skins:
(Character Change menu) Down, Up, Left, Right, Up, Up, Start.

Super Speed:
(Pause menu) Up, Up, Up, Down, Up, Down, Start.

Infinite Extreme Tokens:
(Pause menu) Left, Down, Right, Down, Up, Up, Down, Up, Start.

Unlock ALL Characters at Level 99:
(Character Change menu) Up, Down, Up, Down, Left, Up, Left, Right, Start.

One Skill Point in ALL Skills:
(Character Change menu) Left, Right, Left, Right, Down, Up, Start.

Get 100,000 Techbits:
(Shop menu) Up, Up, Up, Down, Right, Right, Start.

Infinite Health and Energy:
(Pause menu) Down, Up, Down, Up, Right, Down, Right, Left, Start.

Instant Kill:
(Pause menu) Left, Left, Right, Left, Right, Up, Start.

Unlock ALL Danger Room Courses:
(Danger Room menu) Right, Right, Left, Left, Up, Down, Up, Down, Start.

Unlock ALL Videos:
(Review menu) Left, Right, Right, Left, Down, Down, Left, Start.

Unlock Comics:
(Review menu) Right, Left, Left, Right, Up, Up, Right, Start.

Unlock Concept Art:
(Review menu) Left, Right, Left, Right, Up, Up, Down, Start.

Unlock Load Screens:
(Review menu) Right, Left, Right, Left, Up, Up, Down, Start.

Unlock Characters

Professor X:
Beat all the Danger Room missions

Deadpool:
Beat the game

Iron Man:
Collect four homing beacons in every act. Once four are collected get a piece of Iron Man's armor. In Act 5 after locating the beacons save Iron Man. Team bonuses:
Use characters together to receive a Bonus.

Special Ops:
+5% damage Bishop, Deadpool, Nightcrawler, Gambit

Family Affair:
+5 Health regain - Magneto, Professor X, Scarlet Witch, Juggernaut

Energy Corps:
+5% Damage - Bishop, Cyclops, Iron Man, Gambit.

Agile Warriors:
+5% XP - Sunfire, Toad, Deadpool, Nightcrawler.

Brotherhood of Evil:
+5% XP - Magneto, Scarlet Witch, Toad, Juggernaut.

Heavy Metal:
+10 to all Stats - Colossus, Juggernaut, Iron Man, Magneto

Forces of Nature:
+10 to All Resistences - Iceman, Sunfire, Magneto, Storm.

Old School:
+15% Max Energy - Jean Grey, Iceman, Magneto, Toad, Professor X, Cyclops.

New X-Men:
+15% Max Health - Storm, Colossus, Wolverine, Sunfire, Bishop, Nightclawler.

New Avengers:
+15% Max Health - Scarlet Witch, Wolverine, Bishop, Iron Man.

Raven Knights:
+60% Techbit Drops - Professor X, Iron Man, Deadpool, Iceman.

Age of Apocalype:
+100% Attack Rating - Any 4 heroes with Age of Apocalypse skins.

Femme Fatale:
5% Damage inflicted goes to Health - Scarlet Witch, Rogue, Jean Grey, Storm.

Dark Past:
5% Damages inflicted goes to Health - Deadpool, Gambit, Wolverine, Rogue.

Double Date:
20 Health gained per knockout - Jean Grey, Gambit, Rougue, Cyclops.

Bruiser Brigade:
20 Energy gained per knockout Juggernaut, Colossus, Wolverine, Rogue

Unlock Characters

Professor X:
Beat all the Danger Room missions

Deadpool:
Beat the game

Iron Man:
Collect four homing beacons in every act. Once four are collected get a piece of Iron Man's armor. In Act 5 after locating the beacons save Iron Man. Character Skins/Costumes:
Once the first two acts have been completed you will find an X-Traction Point in Act 3 where they will be available. Press L2 at the change character screen to switch between available skins.

Team bonuses:
Use characters together to receive a Bonus.

Special Ops:
+5% damage Bishop, Deadpool, Nightcrawler, Gambit

Family Affair:
+5 Health regain - Magneto, Professor X, Scarlet Witch, Juggernaut

Energy Corps:
+5% Damage - Bishop, Cyclops, Iron Man, Gambit.

Agile Warriors:
+5% XP - Sunfire, Toad, Deadpool, Nightcrawler.

Brotherhood of Evil:
+5% XP - Magneto, Scarlet Witch, Toad, Juggernaut.

Heavy Metal:
+10 to all Stats - Colossus, Juggernaut, Iron Man, Magneto

Forces of Nature:
+10 to All Resistences - Iceman, Sunfire, Magneto, Storm.

Old School:
+15% Max Energy - Jean Grey, Iceman, Magneto, Toad, Professor X, Cyclops.

New X-Men:
+15% Max Health - Storm, Colossus, Wolverine, Sunfire, Bishop, Nightclawler.

New Avengers:
+15% Max Health - Scarlet Witch, Wolverine, Bishop, Iron Man.

Raven Knights:
+60% Techbit Drops - Professor X, Iron Man, Deadpool, Iceman.

Age of Apocalype:
+100% Attack Rating - Any 4 heroes with Age of Apocalypse skins.

Femme Fatale:
5% Damage inflicted goes to Health - Scarlet Witch, Rogue, Jean Grey, Storm.

Dark Past:
5% Damages inflicted goes to Health - Deadpool, Gambit, Wolverine, Rogue.

Double Date:
20 Health gained per knockout - Jean Grey, Gambit, Rougue, Cyclops.

Bruiser Brigade:
20 Energy gained per knockout Juggernaut, Colossus, Wolverine, Rogue