Pachyrhinosaurus for THEGAMINGBARYONYX’s tyrannosaur series it could be the prey for albertosaurus but of course it would not be canon fodder as they would fight back in real life so they should hopefully do so in the THEGAMINGBARYONYX’s series so the males are more vibrant with a colourful frill will females are more dull like you often see in nature they appear in the horseshoe canyon formation segment
Based off a skeletal by Scott Hartman I believe so credit to him Prehistoric planet for the music