Glover 

Cheat mode 
At the castle where you start:
go left to the owl swing by the tree. Press A and he will make eight sounds: Fart, Burp, Cluck, or Hiccup.
Then, press Start and copy each sound he made in order using the following button for each sound to 
receive a code. Press C-Left for the Fart sound. Press C-Up for the Burp sound. 
Press C-Right for the Cluck sound. Press C-Down for the Hiccup sound.

Infinite lives 
Pause the game and press C-Up(5), C-Right, C-Down, C-Right.

Infinite energy 
Pause the game and press C-Right(2), C-Down, C-Right(3), C-Up, C-Left.

Level select 
Pause the game and press C-Up(3), C-Left(2), C-Right, C-Left, C-Right.

Bonus levels 
Pause the game and press C-Down, C-Up, C-Right(2), C-Down, C-Left, C-Right(2). 
If you entered the code correctly, Glover will cheer.
Then, several cheat codes will be displayed and all six bonus levels will be unlocked.

Open check points 
Pause the game and press C-Down(2), C-Right, C-Left, C-Up(2), C-Down, C-Left.

Open portals 
Pause the game and press C-Up, C-Right(2), C-Down, C-Left, C-Down, C-Up, C-Right.

Open all levels 
Pause the game and press C-Down(2), C-Left, C-Up(3), C-Right, C-Down to unlock all levels in worlds that are uncovered,
or all levels if the "Open portals" code has already been enabled.

Play as Froggy 
Pause the game and press C-Up, C-Right, C-Down, C-Right, C-Up, C-Left(2), C-Up. 
Then while playing as a frog, eat insects to gain extra lives.

Big Glover 
Pause the game and press C-Down(3), C-Left(2), C-Down, C-Right, C-Left.

Tilt camera right 
Pause the game and press C-Left, C-Right, C-Up(2), C-Down, C-Right, C-Down, C-Right to rotate the camera angle right.

Tilt camera left 
Pause the game and press C-Right, C-Down, C-Right, C-Down, C-Up(2), C-Right, C-Left to rotate the camera angle left.

Fish-eye lens 
Pause the game and press C-Left, C-Right, C-Left, C-Right, C-Left, C-Right, C-Left, C-Right.

Locate Garibs 
Pause the game and press C-Left, C-Up, C-Right, C-Down, C-Left, C-Up, C-Left(2).

Mad Garibs 
Pause the game and press C-Down, C-Right, C-Down, C-Up, C-Left, C-Down, C-Left, C-Up.

Death spell 
Pause the game and press C-Up, C-Left(4), C-Up, C-Right, C-Up.
Then, press R to cast the spell and kill all opponents.

Frog spell 
Pause the game and press C-Down, C-Left, C-Down(2), C-Left, C-Down, C-Up, C-Left.
Then, press R to cast the spell and turn all opponents in to frogs.

Speed up spell 
Pause the game and press C-Left(2), C-Right, C-Up, C-Right, C-Left, C-Down(2).

Low gravity spell 
Pause the game and press C-Left(2), C-Up, C-Left, C-Right, C-Up(3).

Big ball spell 
Pause the game and press C-Down(2), C-Up, C-Down(2), C-Left, C-Right, C-Down.

Power ball spell 
Pause the game and press C-Up, C-Down, C-Up, C-Down, C-Up, C-Down, C-Left, C-Up.

Enemy ball 
Pause the game and press C-Left, C-Down, C-Up, C-Right, C-Left, C-Left, C-Down, C-Down.

Invisible ball 
Pause the game and press C-Down(2), C-Left(2), C-Up(2), C-Down, C-Up.

Summon ball 
Pause the game after losing the ball, then press C-Up, C-Left(2), C-Up, C-Right, C-Left, C-Down, C-Up.

Control ball 
Pause the game and press C-Left, C-Right, C-Left, C-Right, C-Up, C-Down, C-Right(2).

Boomerang ball 
Pause the game and press C-Right, C-Up(4), C-Left(2), C-Down.

Disable all cheats 
Pause the game and press C-Down(8).

Unknown 
Pause the game and press C-Down, C-Up, C-Right(2), C-Down, C-Left, C-Right(2).