Super Mario All-Stars + Super Mario World - Super Nintendo

Super Mario Bros

Disable Swimming
CAB2-A7AE

Note: Will allow you to jump like a regular level in water levels.

Enemies Die When You Get Close to Them
4026-67AE
402B-67DE

Note: You get power ups from them and 1,000 points.

Super Mario Bros: Lost Levels

Disable Swimming
CABE-6DE5

Note: Will allow you to jump like a regular level in water levels.

Enemies Die When You Get Close to Them
402A-0485
4028-0755

Note: You get power ups from them and 1,000 points.

Super Mario Bros 3

Invincible in Pits and Lava
CAA2-686A
B2A3-66DA
6DA3-660A
D2A3-666A
1D88-08BA

Note: Hold B to jump higher.