Quite a harmless Dino in the wild, only really a threat with a smart rider, so not a threat.

Where could I encounter one on ark mobile cause I really want one so I gathered a lot of berrys

If a pachy and a Trike managed to breed, You'd have yourself a Pachyrhinosaurus.

Pachyrinosaurus are usually found in redwoods

Where could I encounter one on ark mobile cause I really want one so I gathered a lot of berrys They spawn on herb island or drayos cove from what I know

They spawn near the castroides in the centre. Be careful knocking out though because they can run into the water

I once was adventuring, and i saw one of these being chased, and it used deaggro mist, but they kept chasing?!? Did it use aggro mist by accident or something? Weird.

It is very annoying to fight, as when it sustains enough damage it will spray a cloud of pink mist which will drain all stamina on you and your mount (if riding). It is relatively faster than a trike, so it can get away fast

Most new players get this confused with a trike when you see one look at its head