After Johnstone spent a lot of time and a lot more money to complete the Emerald Pokédex, he decided to try his hand at completing the Pokédex in Crystal. As you can see from the thumbnail it took a lot of time but less money (thankfully). That didn’t make it easy though as the video explains. Oh, and this isn’t just a regular Pokédex, this was a living dex where you have to keep one of every species in the boxes (so Bulbasaur and Ivysaur and Venusaur etc.)
Gotta give him props for completing it and getting some shinies in the process! Those 1/8192 odds are no joke.