Amplitude

Code notes:
After a code is activated, it can be repeated to disable its effect. You cannot save the game after activating a code, even though it was repeated to disable it.

All Freq parts:
Press Left, Down, Right, Up, Right, Left, Down during game play. A sound will confirm correct code entry.

All songs:
Press Square, Circle, Square, Circle, Up, Right, Left, Down(2), Right, Left, Up during game play. A sound will confirm correct code entry.

More power-ups:
Press Square, Right, Circle, Left, X, Down, Triangle, Up during game play. A sound will confirm correct code entry.

Auto-pilot mode:
Press Down, X, Up, X, Left, X, Right, X during game play. A sound will confirm correct code entry.

Always slow motion:
Press Up, Down, X, Triangle, X, Down, Up during game play. A sound will confirm correct code entry.

Motion blurring:
Press R3(4), L3(4), R3 during game play. A sound will confirm correct code entry.

Alternate field shape:
Press L3(3), R3(3), L3, R3, L3 during game play to change the field into a circular shape. A sound will confirm correct code entry. Enable the code again to get a shape similar to that from the game Tempest.

Transparent panel surfaces:
Press L3, R3, L3(2), R3, L3, R3(2), L3 during game play. A sound will confirm correct code entry. Start a new game to have transparent panels.

Black panel surfaces:
Press R3, L3, R3(2), L3, R3, L3(2), R3 during game play. A sound will confirm correct code entry. Start a new game to have black panels.

Random gem positions:
Press X(2), Left(2), R3(2), Right(2) during game play. A sound will confirm correct code entry.

Monkey gems:
Press L3(4), R3(4), L3 during game play. A sound will confirm correct code entry.

Power-up master code:
Press Right, Down, Up(3), Right, Left, Right during game play. A sound will confirm correct code entry.

Autoblaster power-up:
Enable the "Power-up master code", then press Up, Left, Down, Up(2) during game play. A sound will confirm correct code entry.

Bumper power-up:
Enable the "Power-up master code", then press Up, Left(2), Down, Up during game play. A sound will confirm correct code entry.

Crippler power-up:
Enable the "Power-up master code", then press Right, Up(3), Right during game play. A sound will confirm correct code entry.

Freestyler power-up:
Enable the "Power-up master code", then press Up, Right, Down, Right, Left during game play. A sound will confirm correct code entry.

Multiplyer power-up:
Enable the "Power-up master code", then press Down, Left, Down(3) during game play. A sound will confirm correct code entry.

Slow-mo power-up:
Enable the "Power-up master code", then press Up, Down, Left(2), Down during game play. A sound will confirm correct code entry.

Maximum combos:
When in freestyle mode, have someone else hold Square, Triangle, or Circle while you jiggle the Left Analog-stick as fast as possible.
mkenyon123.

Black track:
Press R3 on the screen that appears after the game loads your data from your memory card. A sound will confirm correct code entry.
KIZER.

Annie:
Successfully complete the Blastlands bonus song under the Mellow or higher difficulty setting.

Bat Gal:
Successfully complete the Beat Factory Boss song under the Brutal or higher difficulty setting.

Bat Lad:
Successfully complete the Metaclouds bonus song under the Normal or higher difficulty setting.

Biggie:
Successfully complete the Metaclouds bonus song under the Mellow or higher difficulty setting.

Bot Girl:
Successfully complete the Beat Factory bonus song under the Normal or higher difficulty setting.

Bug:
Successfully complete the Beat Factory Boss song under the Insane difficulty setting.

Cyclops:
Successfully complete the Elektro Kore bonus song under the Insane difficulty setting.

Demon Dave:
Successfully complete the Metaclouds bonus song under the Brutal or higher difficulty setting.

Diabolical D:
Successfully complete the Elektro Kore bonus song under the Brutal or higher difficulty setting.

Disco Marv:
Successfully complete the Blastlands bonus song under the Brutal or higher difficulty setting.

Evil Motomatic:
Successfully complete the Elektro Kore Boss song under the Insane difficulty setting.

Fred:
Successfully complete the Neotropolis bonus song under the Mellow or higher difficulty setting.

Goggle Bot:
Successfully complete the Beat Factory bonus song under the Insane difficulty setting.

Grondor:
Successfully complete the Beat Factory Boss song under Normal or higher difficulty setting.

Happy Fun Girl:
Successfully complete the Beat Factory Boss song under the Mellow or higher difficulty setting.

Hotpants:
Successfully complete the Metaclouds Boss song under the Normal or higher difficulty setting.

Kim:
Successfully complete the Blastlands Boss Song under the Mellow or higher difficulty setting.

Kong:
Successfully complete the Beat Factory bonus song under the Brutal or higher difficulty setting.

Larry:
Successfully complete the Blastlands Boss song under the Insane difficulty setting.

Lazy Jay:
Successfully complete the Elektro Kore Boss song under the Normal or higher difficulty setting.

Levar:
Successfully complete the Metaclouds Boss song under the Mellow or higher difficulty setting.

Little Tony:
Successfully complete the Blastlands Boss song under the Brutal or higher difficulty setting.

Mad Melvin:
Successfully complete the Neotropolis bonus song under the Insane difficulty setting.

MC Mike:
Successfully complete the Blastlands bonus song under the Normal or higher difficulty setting.

Mysterion:
Successfully complete the Blastlands bonus song under the Insane difficulty setting.

Naomi:
Successfully complete the Elektro Kore bonus song under the Mellow or higher difficulty setting.

Norm:
Successfully complete the Neotropolis Boss song under or higher Mellow or higher difficulty setting.

Pixel:
Successfully complete the Elektro Kore Boss song under the Brutal or higher difficulty setting.

Rageatron:
Successfully complete the Metaclouds bonus song under the Insane difficulty setting.

Razor X:
Successfully complete the Neotropolis Boss song under the Brutal or higher difficulty setting.

Robofairy:
Successfully complete the Metaclouds Boss song under the Insane difficulty setting.

Roxanne:
Successfully complete the Neotropolis bonus song under the Brutal or higher difficulty setting.

Swat Man:
Successfully complete the Elektro Kore bonus song under the Normal or higher difficulty setting.

Tex:
Successfully complete the Elektro Kore Boss song under the Mellow or higher difficulty setting.

Trollheim:
Successfully complete the Metaclouds Boss song under the Brutal or higher difficulty setting.

Trust Me:
Successfully complete the Blastlands Boss song under the Normal or higher difficulty setting.

Velma:
Successfully complete the Beat Factory bonus song under the Mellow or higher difficulty setting.

Vern:
Successfully complete the Neotropolis Boss song under the Normal or higher difficulty (setting.

Xenon:
Successfully complete the Neotropolis Boss song under the Insane difficulty setting.

Zandork 9:
Successfully complete the Neotropolis bonus song under the Normal or higher difficulty setting.

Bonus song:
Complete all songs, including the bonus songs on "Insane" to unlock the hidden bonus song "Spaztik" by Cosmonaut Zero. Note: This song's tracks last twice as long as every other song.
88 Fingerz.

FreQ with unlocked parts and skip the training:
Choose the FreQ you unlocked the parts you want with, create the new character, name it, and save. Your old character should not be deleted.
Krimoi730.

Hint: Halo:
Unlock all bonus songs by getting the desired amount of points needed for each. After you unlock them all, complete them. You will now have Cousmonaut Zero's song In The Blast Lands. After you finish Cosmonaut Zero's song, you will unlock a halo for your FreQ.
B.J. Guthrie.

Hint: Fast freestyle:
If and when the freestyle line is straight and not meshy, hold Square and hold Right Analog-stick Right. If the freestyle line is blotchy and sprinkly, this will not work.
Jacob Guthrie.

Glitch: Fly into space:
When your energy meter is red and has exclamation point and you are playing the bar that is keeping you alive, use a freestyle item before you finish that piece. You will fly out into space.
BMANHILL.