Super Blocky Mode
"Super Blocky Mode" changes the view of the game and minimizes the graphics, but you can roll around faster and get through levels. At the title screen, enter "Left," "Left," "Right," "Right," "Down," "Down" and "A" to activate it. Reset the Game Boy to remove the code.
Super Nice Try Mode
Enter "Up," "Up," "Down," "Down," "Left," "Right," "Left," "Right," "B" and "A" at the title screen to activate "Super Nice Try Mode." In this mode, you get extra lives and chances to complete levels without losing the game.
GameShark Setup Code
To enable codes on the GameShark device, first enter "93BD91492CE6-231560FCC88A-5BDAFC9973BF" as the startup code. This will activate the GameShark for use with "Super Monkey Ball Jr."
Infinite Lives and Continues
Enter the code "44EABD594513" to receive infinite lives. Enter the code "BA3500EE9E7C" for infinite continues.
Mini Games
"Super Monkey Ball Jr." has three mini-games you can unlock. Use the code "45C87715F183" to unlock the "Monkey Fight" game and "61D86354D382" to unlock "Monkey Bowling." Use "65D87755D383" to unlock "Monkey Golf."
Stage Select
Select any level with the code "9F6537E1421B-C145652DF183." At the "Stage Select" screen, scroll through to pick the level you want to play.
Monkey Fight Cheats
Use GameShark codes to unlock cheats for the "Monkey Fight" mini-game. Use "DC21377C658E-BF9172E042CA" to get a really big glove. Use "DC21377C658E-DD47DB24A1AE" for a long punching reach. Have unlimited vortex powers with "DC21377C658E-078173B070C2."