The Pokémon gains a third type based on inflicted status condition.

Added as part of Mikitari dex.

Every time a status condition is applied to the Pokémon, it gains the type of that condition as a third type gaining an immunity to that condition too. Burn -> Fire type, paralysis -> electric type, freeze -> ice type, poison/bad poison -> poison type. If new status conditions were/are added in pe they can be added too.