Uploaded August 2021 | Updated September 2026, 23 hours ago

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This video shows all the levels which aren't included in the 256 worlds/levels; those are only accessible with the code 074F:XX.
Underwater 7-4 and 8-4
Overworld variants of underwater levels
Underground variants of underwater and overworld levels
Castle variants of underwater, overworld and underground levels

Underwater levels:
YELPKG + 074F:XX (NES)
7CBC:07 + 074F:XX (FDS)
075F:23 + 074F:XX (both)

Overworld levels:
074F:XX

Underground levels:
ZELPKG + 074F:XX (NES)
7CBC:02+ 074F:XX (FDS)
075F:23 + 074F:XX (both)

Castle levels:
GELPKG + 074F:XX (NES)
7CBC:04 + 074F:XX (FDS)
075F:23 + 074F:XX (both)

Change XX to anything within those ranges:
00 to 21 (Underwater)
FD to 1E (Overworld)
E7 to 08 (Underground)
E4 to 05 (Castle)
Any value outside those ranges are glitched levels, RAM areas and black screens.

For example, ZELPKG + 074F:F2 would be underground 2-1. (for FDS, change ZELPKG to 7CBC:02)

Level order:

Water bonus
2-2 / 7-2
8-4 water area
3-3
8-3
4-1
6-2
3-1
1-1
1-3 / 5-3
2-3 / 7-3
2-1
Pipe intro
5-1
Cloud bonus
4-3
6-3
6-1
4-2 Warp zone
8-1
5-2
8-2
7-1
Night cloud bonus
3-2
1-2
4-2
Coin room
1-4 / 6-4
4-4
2-4 / 5-4
3-4
7-4
8-4