Miss Dada  🏳️‍⚧️

Thank you to everyone who responded! This confirmed some data points I expected (almost everyone knew about missingno, almost all of those folks learned about it through word of mouth) I was surprised to see that so few people knew about the fight safari zone pokemon glitch

Since a few people asked in the responses, they are separate but related glitches. Surfing up the coast of cinnabar causes a bug where you're on water but the game uses the grass encounter table. Safari zone glitch was likely discovered first

If the last zone you were in was the safari zone, you can use this to encounter safari zone pokemon normally, making them much easier to catch. Encountering missingno requires loading invalid data into the encounter table (usually the player name)