You can play gen 1 and gen 2 on original hardware on 2x and even 3x speed. You can play them on Pokémon Stadium on Nintendo 64 which has special hardware to insert the Game Boy modules. You have to unlock the Doduo and Dodrio modes first by finishing parts of Stadium’s tourneys but then you have an official way to play the original games sped up.
You can play gen 1 and gen 2 on original hardware on 2x and even 3x speed. You can play them on Pokémon Stadium on Nintendo 64 which has special hardware to insert the Game Boy modules. You have to unlock the Doduo and Dodrio modes first by finishing parts of Stadium’s tourneys but then you have an official way to play the original games sped up.