They form groups of roughly 20 individuals. Their mutual bond is remarkable—they will never let down a comrade.
– Pokémon Sun Pokédex
Passimian is one of the version exclusive Pokemon, exclusive to Sun. Its counterpart is Oranguru. It’s a little strange that it’s just Fighting type while Oranguru is Normal/Psychic.
It has a unique ability, Receiver, which copies the ability of a fainted ally.