New Super Mario Bros. (NTSC-U/C)

Max Score [hawkeye2777]
0208B384 05F5E0FF

Moon Jump (Press B) [hawkeye2777]
94000130 FFFD0000
021B6AB0 00002000
D2000000 00000000

Moon Jump (Press A) [hawkeye2777]
94000130 FFFE0000
021B6AB0 00002000
D2000000 00000000

Moon Jump (Press X) [hawkeye2777]
927FFFA8 FBFF0000
021B6AB0 00002000
D2000000 00000000

Moon Jump (Press Y) [hawkeye2777]
927FFFA8 F7FF0000
021B6AB0 00002000
D2000000 00000000

Slow Fall (Press B) [hawkeye2777]
94000130 FFFD0000
021B6AB0 FFFFFF00
D2000000 00000000

Slow Fall (Press A) [hawkeye2777]
94000130 FFFE0000
021B6AB0 FFFFFF00
D2000000 00000000

Slow Fall (Press X) [hawkeye2777]
927FFFA8 FBFF0000
021B6AB0 FFFFFF00
D2000000 00000000

Slow Fall (Press Y) [hawkeye2777]
927FFFA8 F7FF0000
021B6AB0 FFFFFF00
D2000000 00000000

X-Y Coordinate Modifier (Hold X+Dpad to modify X Axis; Y+Dpad to modify Y Axis) [hawkeye2777]
94000130 FFFD0000
021B6AB0 00002000
D2000000 00000000
A4000130 FFFD0000
021B6AB0 00000577
D2000000 00000000
94000130 FFFE0000
021B6AB0 00002000
D2000000 00000000
A4000130 FFFE0000
021B6AB0 00000577
D2000000 00000000
94000130 FFEF0000
927FFFA8 FBFF0000
D9000000 021B6A3C
D4000000 00009000
D6000000 021B6A3C
D2000000 00000000
94000130 FFDF0000
927FFFA8 FBFF0000
D9000000 021B6A3C
D4000000 FFFF0000
D6000000 021B6A3C
D2000000 00000000
D3000000 021B6A3C
F21B6A4C 00000008
D2000000 00000000
94000130 FFBF0000
927FFFA8 F7FF0000
D9000000 021B6A40
D4000000 00003000
D6000000 021B6A40
D2000000 00000000
94000130 FF7F0000
927FFFA8 F7FF0000
D9000000 021B6A40
D4000000 FFFFD000
D6000000 021B6A40
D2000000 00000000
D3000000 021B6A40
F21B6A50 00000008
D2000000 00000000

This code also neutralizes your gravity when A/B are not pressed; and when A/B are pressed it acts as a Moon Jump. You can't go through many objects with this, unfortunately.