Keen Smell: Junkrat has advantage on Wisdom (Perception) checks that rely on smell
Beast's Defense: When in sight of Sivara, Junkrat has advantage on all saving throws.
Greater Favored Enemy: Junkrat gains the same benefits as Sivara from these features. See Revised Ranger p. 2 and 4 for details
Bite: Melee Weapon Attack. One target.
+6 to hit. On hit: 1d6 +3 piercing damage
Claws: Melee Weapon Attack. One target
+6 to hit. On hit: 2d4 +3 slashing damage
Coordinated Attack: When Sivara uses an attack, Junkrat, as a reaction, can use a melee attack