Delta Pokémon
Delta Pokémon are Pokemon that have been mutated in the Holon region to have differing types from their mainline brethren, in some cases in a scientifically unethical manner. In WAAPT canon Delta Pokemon are not limited to the types listed in the TCG, and even within individual species the typing can differ immensely. Amongst non-Deltas they are often treated poorly and ostracized, and the Pokémon League prohibits their unregistered use in tournaments.