The basic premise of this category is that you obtain every pokemon available- but each pokemon must have a tera-type different from their regular typing. So, for example, a Pikachu with an electric tera-type won't count for the speedrun, but the purchasable flying tera-type Pikachu would. Maybe this would work better as a challenge than a speedrun, but I could see it working either way.

Pokemon games add new categories by doing runs themselves and submitting the video to the discord for mods to add it as a category