Thick Wool: The Wooloo gains resistance to non-magical bludgeoning and cold damage, yet due to the wool being flammable gains a vulnerability to fire damage. Its thick Fleece also increases its natural defense. AC= 10+Dex+Cons

Keen Senses: The Wooloo has advantage on Wisdom (Perception) checks that rely on smell and hearing.

Charge:  the Wooloo moves at least 15 feet straight toward a target and then hits it with a Tackle on the same turn, the target takes an extra (1d6) bludgeoning damage. If the target is a creature it must succeed on a DC 15 Strength saving throw or be knocked prone.

Dynamax: is a temporary transformation affecting Creatures. Beast masters who obtain a Dynamax Band are able to Dynamax their Creatures. Dynamaxing increases a Creature's size drastically, as well as changing the moves of the Creature and increasing their stats in battle (Creature's Size becomes Huge, Health increases by 2D10+3), but can only be used once during a battle, and lasts only for three turns. In addition, it can only be performed in certain areas. (Your DM chooses the applicable areas, if any)

Dynamax Actions

Max Strike. The Wooloo targets one creature it can see within 30 ft. That creature must make a Dexterity  Saving Throw against a DC 12 or take 2d6 bludgeoning damage and have their speed reduced by 10 feet until the end of that creature's next turn.