Ankylorex

Ankylorex is a hybrid creature appearing in Adventure of pig man

origins
Ankylorex was PurpleBorg's first successful creation

Appearance
Ankylosaurus is a mix of a T-rex and an Ankylosaurus

Season 1
He appeared in season 1 episode 5

He was a body guard of PurpleBorg

Season finale
Ankylosaurus was used as a sacrifice (and possibly Heatseeker) to summon Worm Hole Dragon