From Pathfinder #151: The Show Must Go On, which isn't enabled.

Pinacosaurus

CREATURE 4

LARGE ANIMAL DINOSAUR

Perception +10; low-light vision

Skills Athletics +13

Str +5, Dex +0, Con +4, Int -4, Wis +2, Cha -1

AC 21; Fort +12, Ref +8, Will +8

HP 70

Speed 25 feet

Melee Tail +13 (backswing, reach 10), Damage 2d6+5 bludgeoning plus Punishing Tail

Melee Foot +13 (unarmed), Damage 1d8+5 bludgeoning

Punishing Tail

A creature hit by the pinacosaurus's tail must attempt a DC 21 Fortitude save. On a failure, it's Slowed 1 until the end of its next turn; on a critical failure, it's Stunned until the end of its next turn.

Trample

Small or smaller, foot, DC 21 basic Reflex save

The monster Strides up to double its Speed and can move through the spaces of creatures of the listed size, Trampling each creature whose space it enters. The monster can attempt to Trample the same creature only once in a single use of Trample. The monster deals the damage of the listed Strike, but trampled creatures can attempt a basic Reflex save at the listed DC (no damage on a critical success, half damage on a success, double damage on a critical failure).

Pathfinder #151: The Show Must Go OnOGL