Jimmy Neutron vs Jimmy Negatron Gameboy Advance Cheats

Unlock Level 2
Use the following code at the passwords menu: JJB?X6XC9!QW

Unlock Level 3
Use the following code at the passwords menu: 5Q76J0KHX14K

Unlock Level 4
Use the following code at the passwords menu: ?DTGYSPQR$Y0

Unlock Level 5
Use the following code at the passwords menu: VOKC98TYL-JN

Unlock Level 6
Use the following code at the passwords menu: SDBH7F9MJ5+J

Unlock Level 7
Use the following code at the passwords menu: C!1MBNIL4?CC

Unlock Level 8
Use the following code at the passwords menu: 8XY271+z?8B3

All Dark Dimension Levels
Enter at "can I continue a game", (xcqdkvlp) there has to be circles around the (qdkv).