NES Game Genie Hacking: Super Mario Bros. 1 - Walk Through Walls
In this video I will play a game, identify something I can hack, try to achieve the result I want using debugging tools and ultimately produce a valid Game Genie code. Walk through walls are a bit of a pain in this game as you need to trigger the end of the level block by walking into it after you've hit the flagpole. This code solves that by letting the hit-detection routine go through but disabling the way the game uses the flag to hit the wall (while still keeping the flag active that you've hit the wall).
Other walk through walls codes exists but none are clean as far as I know (they will hinder you in some way).
With this code you can still be hindered if you jump at a wall and it hits between the blocks, but otherwise it doesn't stop you at all when walking/running through blocks.
Code found:
OAAIET
GXGUGS - Walk Through Walls (Clean).