Beta Levels
From SMWiki
The obvious example of an unused level is the "beta tester level" which is just a level with a no-yoshi intro (similar to the ghost house and castle/fortress entrances) and a garbled background with just the word TEST spelled out in rotating blocks and a gap at the end for Mario to fall to his doom at. Out of the 512 levels that make up Super Mario World, 264 of those are the "beta tester levels".
List of unused levels
| Name | Level Address | Level Number | Description |
|---|---|---|---|
| Test Level | 30200 | Various | Placeholder of empty level number. |
| Duplicated level 15 STAR ROAD | 313E5 | 16 | Copy of level 15. |
| Duplicated level 15 with weird background #2 MORTON'S PLAINS | 313E5 | 17 | Copy of level 15, with weird backgrounds. |
| Level 108 STAR ROAD | 382C3 | 108 | A testing level for vertical level compatible slopes. |
| Ride Among the Clouds | 30263 | N/A | |
| Mushroom Scales | 302BD | N/A | |
| Boss Test | 30338 | N/A | |
| Lava Cave | 30464(Layer 2) 304EB(Layer 1) | N/A | |
| Twin Blocks | 3059C | N/A | |
| Beta level 01A | 305AB(Layer1) 30701(Layer2) | N/A | |
| Pipe 'n' Ground | 3073D | N/A | |
| Unused Ghost House Exit | 30875 | N/A | |
| Blank (header only) | 38218 | N/A | |
| Unused Ghost House Exit 2 | 38260 | N/A | |
| 3 bushes, no ground | 38281 | N/A | |
| Castle and exit enabled pipe | 30584 | N/A |
