Procoptodon

Procoptodon is the largest species of kangaroo to ever live. Standing at a resounding 12 feet in height, it is a menacing creature. A procoptodon uses its huge hind limbs as bludgeons to fend of smaller predators or among the males to establish dominance. If a larger predator such as a megalania attempts to assault the mob, they will bound at top speed in a zig-zag pattern to attempt an escape.

Originally Posted by Raptorial of the Wizards Community forums. 
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Procoptodon
Large animal
Hit Dice	2d8+14 (23 hp)
Initiative	+4 (+4 Dexterity)
Speed	50 ft. (10 squares)
Armor Class	14 (-1 size, +4 Dexterity, +1 natural), touch 13, flat-footed 10
Base Attack/Grapple	+1/+14
Attack	Kick +9 melee (1d8 +9)
Full Attack	Kick +9 melee (1d8 +9)
Space/Reach	10 ft./10 ft.
Special Attacks	Pounce
Special Qualities	Low-Light Vision
Saves	Fort +10, Ref +7, Will +1
Abilities	Strength 28, Dexterity 18,Constitution 25, Intelligence 2, Wisdom 12, Charisma 5
Skills	Hide 0, Jump +10, Listen +3, Spot +3
Feats	Endurance
Environment	Warm scrub
Organization	Solitary, Pair, or Mob (5-20)
Challenge Rating	2
Treasure	None
Alignment	Always neutral
Advancement	3-4 HD (Large); 5-6 HD (Huge)
Level Adjustment	–

Combat

A procoptodon uses its huge feet in combat.

Pounce (Ex) When a procoptodon makes a charge, it can follow with a full attack.

Society

Procoptodons live in large groups similar to that of modern kangaroos called mobs. A mob is led by the toughest male, known simply as the boss. Mobs are usually quiet with the exception of the occasional fight for dominance or females.