From Pathfinder #154: Siege of the Dinosaurs, which isn't enabled.

War Sauropelta

CREATURE 12

UNCOMMON LARGE ANIMAL DINOSAUR

Perception +23; low-light vision

Skills Athletics +25

Str +7, Dex +2, Con +7, Int -4, Wis +4, Cha +0

AC 34; Fort +25, Ref +20, Will +22

HP 220; Immunities olfactory

Buck

DC 32 Reflex

Most monsters that serve as mounts can attempt to buck off unwanted or annoying riders, but most mounts will not use this reaction against a trusted creature unless the mounts are spooked or mistreated.

Trigger A creature Mounts or uses the Command an Animal action while riding the monster.

Effect The triggering creature must succeed at a Reflex saving throw against the listed DC or fall off the creature and land Prone. If the save is a critical failure, the triggering creature also takes 1d6 bludgeoning damage in addition to the normal damage for the fall.

Dogged Persistence

Frequency once per minute

Trigger The war sauropelta would be affected by the Immobilized, Paralyzed, Slowed, or Stunned conditions, or by an effect that would give it a penalty to its Speeds, from a source of 14th level or less

Effect The war sauropelta negates the triggering condition or effect.

Speed 25 feet

Melee Tail +24 (backswing, reach 10), Damage 3d8+13 bludgeoning plus Punishing Tail plus Push

Melee Foot +24 (unarmed), Damage 3d6+13 bludgeoning

Punishing Tail

A creature struck by the war sauropelta's tail must attempt a DC 32 Fortitude save. On a failure, it's Stunned 1; on a critical failure, it's Stunned 3.

Trample

Medium or smaller, foot, DC 32 basic Reflex

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).

Push

Requirements The monster's last action was a successful Strike that lists Push in its damage entry

Effect The monster attempts to Shove the creature. This attempt neither applies nor counts toward the monster's multiple attack penalty. If Push lists a distance, change the distance the creature is pushed on a success to that distance.

Pathfinder #154: Siege of the DinosaursOGL