Super Mario World (NES)

The NES Super Mario World is probably the most accurate unlicensed port of the SNES original out there. Sure, it's missing some levels (most notably the Switch Palaces and secret worlds) and doesn't have (for example) Banzai Bill, but it ports over a lot of stuff pretty faithfully.

Probably the only real detriment is the somewhat-lackluster controls, although there are Game Genie codes to fix the jumping physics.

Mario


Super Mario and Fire Mario have several sprites that go unused. Some things to note:
 * While Mario can throw fireballs in the game, the second unused sprite uses tiles from Super Mario's graphic banks, hence why this is unused.
 * The last sprite seems to be a different head for Mario, but it's found with the Fire Mario sprites and no other tiles exist for this variation.

Enemies


Unused sprites for Muncher. The ones that appear in-game only have one frame and act as a background hazard. These look like they could be used as sprites.



Lakitu and Spiny look like they were planned at one point, and could have appeared in Forest of Illusion 4 (Chocolate Island's first level in this port). No graphics exist for a cloud that Mario could ride in, however.



Although horizontal Podoboos are used in-game, they use a different style and are not animated.



Bullet Bills were apparently planned as well. These could've appeared in Cheese Bridge Area.



Graphics for a digging Chargin' Chuck, which is strange since they only appeared in one level of the original: Valley of Bowser 4, which did not get ported over.



A sprite for a clapping Chargin' Chuck.



Fishbone's graphics. Similar to the digging Chargin' Chuck, the areas Fishbone was encountered in the original are not in this port.



Flattened sprites exist for Koopas and Rexes, but aren't seen in-game. This is especially odd given that Dino-Torches have a proper flattened sprite.

Miscellaneous


An animation for the Flip Block. While flipping exists in the ROM, the blocks never do so. Interestingly, this does appear in the Forest of Illusion Castle of the incomplete version! (It's replaced with a stationary Flip Block in the complete version.)



Egg shell pieces for when Yoshi hatches out of an egg.



A tiny Boo meant for the Ghost Houses on the map.

Hidden JY Logo


While in any level, pause and press Up, Right, A, Down, Right, B, Up, Left to trigger a hidden JY logo screen, using the standard full-screen logo found in most JY-published games. The only way out is to reset.