To unlock the Old Skool Move with infinite spin, complete the game.

Activate the following cheats by pausing the game, holding RT, and entering the corresponding sequence of buttons. Continue to Hold RT until the game resumes.

CHEAT FUNCTION - CHEAT CODE
Shadow Crash - While holding RT, press Y, X, Y, A.
Big Head Crash - While holding RT, press X(2), Y, A.
Big head shadow Crash - While holding RT, press X, Y, X, Y.

To unlock the Free Kick move, complete the game on Hard.

To easily jack a creature, wear a skin that matches it. You will then be able to knock out the creature with one hit.

ACHIEVEMENT - HOW TO UNLOCK
Whumpa Warrior (15 points) - Beat All Whumpa Island Episodes.
Goose Goose Duck! (10 points) - Jack A Yuktopus.
Temple Of Boom (10 points) - Beat Temple Episode.
Harder They Fall (15 points) - Beat All Lumber Yard Episodes.
Tiny Detour (10 points) - Beat Lava Episode.
Beach Blanket Bombardment (15 points) - Beat All Beach Episodes.
Facts of Strife (15 points) - Beat All Factory Episodes.
All Bark, No Might (10 points) - Jack Uka Uka.
Barking Up The Wronged Tree (25 points) - Beat All Uka Tree Episodes.
Sticky Fingers (15 points) - Jack Nina's Arachnina.
Courting Catastrophe (25 points) - Beat All Cortex Lair Episodes.
Gold Digger (15 points) - Earn 1 Gold Episode Idol.
Mojo Magic (10 points) - Beat 1 Mojo Room Challenge.
Five By Five (10 points) - Accrue 5 Extra Lives.
Easy Pickings (15 points) - Collect 5 Hidden Idols.
Ringer (15 points) - Earn 5 Gold Episode Idols.
Soaking In It (25 points) - Unlock 5 Creature Costume Idols.
Like A Cat (20 points) - Accrue 9 Extra Lives.
Mojo Mania (15 points) - Beat 10 Mojo Room Challenges.
Stayin' Alive (30 points) - Accrue 15 Extra Lives.
Crate Crazy (20 points) - Smash 100 Crates Of Any Scale.
Aiming To Please (20 points) - Jack 20 Projectile Creatures By Any Means.
Brutal Buffet (35 points) - Jack 5 Of Every Type Of Jackable Creature.
Baker's Dozen (13 points) - Jack 13 Strongs By Any Means.
Carry A Bigger Stick (15 points) - Jack 5 Captains By Any Means.
Duplex Planet (20 points) - Play Co-Op.
Fits Like A Glove (10 points) - Unlock 1 Creature Costume Idol.
Gimme Some Skin (26 points) - Unlock 10 Creature Costume Idols.
Midas Touch (25 points) - Earn 10 Gold Episode Idols.
Master At Harms (25 points) - Defeat 200 Minion Fodder.
Mojophoria! (25 points) - Beat All Mojo Room Challenges.
Treasure Hunter (25 points) - Collect All 20 Hidden Idols.
Sampler Pack (30 points) - Jack 1 Of Every Type Of Jackable Creature.
Monster Whisperer (30 points) - Jack 75 Strong Creatures.
Self-Help Guru (15 points) - Fully Upgrade Crash's Health.
Mojofied (30 points) - Unlock & Upgrade All Crash's Abilities.
Master Of Disguise (36 points) - Unlock All Creature Costume Skins.
JACK KING (75 points) - Beat 100% of the Game.
Alive & Kicking (10 points) - Beat All Episodes on Hard.
Over Easy (25 points) - Earn Gold for All Episodes on Easy.
Medium Rare (35 points) - Earn Gold for All Episodes on Medium.
Hard Knocks (60 points) - Earn Gold for All Episodes on Hard.
Right Stuff (5 points) - Free fall for 5 seconds.
Big Spender (10 points) - Spend nine lives in a episode.
Idle Hands (15 points) - Let Crash do 10 funny things.
Eavesdropper (20 points) - Five creature conversations heard through.
Where Did The Time Go? (25 points) - Spend more than 25 minutes in an episode.

Unlock the following skins by performing the corresponding tasks:

SKIN -  HOW TO UNLOCK
Battler - Jack 35 Battlers.
Bratgirl - Beat 130 Brat Girls.
Doom Monkey - Beat 500 Doom Monkeys.
EE-Lectric - Jack 50 EE-Lectrics.
Goar - Jack 30 Goars.
Halloween - Complete 50% of the game.
Koo-ala - Beat 150 Koo-Alas.
Magmadon - Jack 50 Magmadons.
Ratnician - Beat 200 Ratnicians.
Rhinoroller - Jack 30 Rhinorollers.
Scorporilla - Jack 15 Scorporillas.
Shellephant - Jack 15 Shellephants.
Sludge - Jack 50 Sludges.
Snipe - Jack 50 Snipes.
Spike - Jack 50 Spikes.
Stench - Jack 50 Stenches.
Valentine - Collect all Gold Idols.
Voodoo Bunnie - Beat 200 Voodoo Bunnies.