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>It has been known to become so angry that it dies as a result. Its face looks peaceful in death, however.
>Some researchers theorize that Primeape remains angry even when inside a Poké Ball.
>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.