It’s certainly been an interesting time for NES fans, hasn’t it? First we had that finding that a certain guy in the Punch Out crowd ducked on the frame where Little Mac should counter Piston Honda. And now, it seems like we’ve learnt something new about Super Mario Bros 1! Remember Lakitu? How in this game, he threw spinies straight down from the top of the screen?
Well that’s a mistake. His throws were meant to have real physics. So the Spiny Eggs would arc down and bounce off pipes.
You can see a comparison here. The video on the right shows how they were meant to act:
Pretty interesting, isn’t it?
Either way, there’s a patch for the game on the Cutting Room Floor wiki. Which can be downloaded here:
They’ve also got a series of notes that go through the game code line by code and explain why this is happening. Those can be read here:
So yeah, apparently Lakitu’s physics were messed up since 1985. That’s a pretty impressive run for a glitch like this, and shows that even Nintendo can miss simple things.