I even have 2 Mews. I also had a MissingNo at one point, but unfortunately it evolved into a Rhydon for whatever reason

Yes, that is a jailbroken calculator

I do have a GameBoy Advance SP, but the only games I have for it are Pokemon Blue, Pokemon Crystal (the cartridge has a dead battery unfortunately), and Elmo in Grouchland

I like Pokemon Yellow though, and back in highschool I was really bored, so I ended up putting a GameBoy emulator and Pokemon Yellow on my calculator

At one point I saw a video where someone was speedrunning obtaining all 151 Pokemon on the same cartridge, and I ended up following along with the video…and lo and behold, all 151 Pokemon on a vanilla ROM without needing to trade Pokemon with another copy of the game. This was years ago, but I recently found this calculator and remembered I had a 100% save file for Pokemon Yellow on it, and figured I'd share

https://youtu.be/CL3xn_Miai0 this was the video in case anyone was wondering how to accomplish this