u/Dakral_

I remeber when I was a kid whatching this cartoon about a dinosaur (I'm pritty sure it was a brachiosaurus or something like that) going thrue a waterfall on some kind of a raft and ending up in moder time, an evil rich guy wants to capture the dinosaur and make him an attraction for money and two teenagers want to help the dinosaur.

It is not "We're Back! A Dinosaur's Story" if I remember correctly based on the animation quality it shoud have been made between 2000 and 2005.

I think it was a tv cartoon and not a movie the waterfall part if I remember correctly was part of the intro.

Unfortunately I don't remember anything else