All characters and levels:
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Press L, R, B, X at the title screen.
All medals and trophies:
————————
Press R, L, Y, X at the title screen.
All story mode chapters:
————————
Press Y, X, R, B at the title screen.
All challenges:
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Press Y(3), B(3), Y, X, B, X(3), Up, Down, Left, Right, L, R at the
title screen.
Super Speed power-up:
———————
Press L(2), R(2), L, R, L, R, X, B, Y(2) at the title screen.
Pizza One:
———-
Press Up(2), Y(2), Right(2), B(2), Down(2), L, R, Left(2), X(2), L, R
at the title screen.
Pizza Two:
———-
Press B(2), X(2), R(2), Left(2), L(2) at the title screen.
Pizza Three:
————
Press Down(2), Right, B, Up, Y, Left, X, L(2) at the title screen.
Slammageddon:
————-
Press Up(2), Down(2), Left, Right, Left, Right, Y, X(2), L, R at the
title screen.
Unlock Anthrax:
—————
Complete Bonus 7 in Mega Challenge mode.
Unlock Captain Hook:
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Complete Tournament 25 in Mega Challenge mode.
Unlock Cyclops:
—————
Complete Challenges 36, 37, 38, 39, and 40 in Mega Challenge mode.
Unlock Donkey:
————–
Complete Tournament 7 in Mega Challenge mode.
Unlock G-nome:
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Complete Challenges 11, 12, 13, 14, and 15 in Mega Challenge mode.
Unlock Huff N’ Puff Wolf:
————————-
Complete Tournament 20 in Mega Challenge mode.
Unlock Humpty Dumpty:
———————
Complete Bonus 4 in Mega Challenge mode.
Unlock Luna:
————
Complete Challenges 26, 27, 28, 29, and 30 in Mega Challenge mode.
Unlock Quasimodo:
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Complete Tournament 3 in Mega Challenge mode.
Unlock Robin Hood:
——————
Complete Tournament 13 in Mega Challenge mode.