Title says all. Catch all Pokémon without using any glitches.

There's already a guide for that.

https://www.speedrun.com/pkmnrbyext/guide/bbwkt

Of course only one cart is used, so only 124 Pokemon can be caught.

There are categories for this already.

124 Glitchless: https://www.speedrun.com/pkmnrbyext#124_Glitchless_RedBlue 150 Co-Op: https://www.speedrun.com/multiple_pokemon_games#Catch_em_all