I am Error (Glitches and stuff)

[Geno]

Another screen that I had previously posted in the footage topic:
There is a glitch in Super Mario All-Stars where you can duplicate the Mushroom Blocks in Super Mario Bros. 2's World 6-2.

I'm specifying the All-Stars version, as it is not possible in the NES or GBA versions.

With a lot of patience (and not dying), one can even get the Mushroom Blocks stacked up to this point.

[Swordkirby]

I have no screenshots i since I played it on a real cartridge, but as Yoshi (only luigi can access the level) I fought cheif chilly by glitching through the floor near the door to bowser in the sky (at the stairs to be specific.).