I don’t have a mechanical keyboard but if I did, I’d get some of these. Hiros Lee is a Vietnamese keycap maker and their artisan Pokémon keycaps are incredible. You can get individual keycaps featuring all your favourites such as Bulbasaur, Squirtle, Articuno, Zapdos, Moltres, Arcanine, Milotic, and spacebar featuring all the Gen 1 starters including Pikachu.
Artisan Pokémon keycaps from Hirosart
Typing never felt so cool.