suppermariobroth:

In Super Mario World, it is possible to activate a secret exit in a level after dying under certain circumstances. In Forest of Illusion 3, entering the underground room with the key and keyhole and letting time run out while standing above the keyhole with the key in Yoshi’s mouth will cause Mario and Yoshi to die, but still activate the keyhole as they pass it while falling offscreen. The level then counts as being completed successfully, and no death is counted.
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| Twitter | Patreon | Store | Source: myself, Super Mario World (NA, SNES) in SNES emulator

suppermariobroth:

Top: the Japanese and US versions of Super Mario Bros. have a one-block gap above the pipe leading out of the water in Worlds 2-2 and 7-2. If Mario is in Super or Fire form, it is very easy to get stuck in the wall by ducking on the ground and then swimming into the gap. Mario will get sucked into the rocks and be unable to escape, with the only option being to wait until the time runs out to restart the level.

Bottom: in the European release, Nintendo has corrected the error in the simplest way possible. Rather than patch out the glitch that results in Mario being sucked into the wall (it can still be performed in other places in that version), the developers simply added a block to close the gap.
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| Twitter | Patreon | Store | Source: myself, Super Mario Bros. (US and EU) in NES emulator

suppermariobroth:

The Japanese version of Mario’s Picross contained four puzzles that were cut from all other versions for depicting objects not appropriate for children, such as a cocktail, a beer stein, a cigarette in an ashtray, and a glass of wine. These were changed to more appropriate images: a Boo, a bird, a rabbit and a top hat respectively, for the other regions.
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| Twitter | Patreon | Store | Source: see bottom of image

suppermariobroth:

In this post, you can see two recordings of gameplay of Super Mario World side by side. Both start at a pipe near the middle of the Chocolate Island 1 level, then the footage on the left goes inside the pipe to get launched over the gap, while the footage on the right jumps over the gap instead. This results in an unexpected difference at the next gap with the springboard: if Mario goes into the pipe, there is a level midpoint tape above it. If Mario does not go into the pipe, the midpoint is absent.

The reason for this is that even though it may look like Mario is immediately emitted back into the level when he enters the pipe, he actually enters a parallel version of the level instead, one almost entirely identical but with small differences such as the existence of the midpoint tape.

suppermariobroth:

In Level 6-9 of Super Mario Bros. 3, it is possible to skip the entirety of the level by using a glitch to jump over the wall at the start. If Small Mario jumps towards the wall, touches it at exactly the right pixel and the A button is pressed again, he will perform another jump in mid-air and have enough height to get to the top of the wall. From there, going to the right will lead directly to the end of the level. Warning: there is an unseen Koopa Troopa on top of the wall that may kill Mario, so it is best to keep jumping to avoid touching it. (Source)