One of the most statically unlikely encounter (or rather lack of encounter) to ever happen in Pokémon history. The odds are over1 in 2 and a half trillion.

Statistically there's a roughly 11.7% chance per step to encounter a wild pokémon. To avoid doing so for 230 consecutive steps as seen in this clip by speed runner shenanigans has a probability of (1-.117)²³⁰ or roughly 3.72E-13. That's about 1 in 2,685,580,514,347.

Assuming 1 step takes a second, recreating this footage without modding the game would take 600 trillion seconds or 19.57 million years. In my opinion, the only way this could be argued to not be the most unlikely thing to have ever occured with in a pokémon game is if it wasn't random at all and some gen1 glitch or full on hardware failure caused it. Otherwise, this is 5 times more unlikely than someone getting struck by lightning 3 times over the course of their life and living to tell the story.