As part of its ongoing efforts to promote every single Pokémon out there, The Pokémon Company has shared special content dedicated to Primeape:
Did you know? It will never forgive opponents who have angered it. Even after it has beaten them down until they can’t move, it never ever forgives. The blood vessels in its brain are sturdier than those of other Pokémon, so it can stay healthy despite its constant raging.
Source: The Pokémon Company
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