It can be assumed that, like his Earth-616 counterpart, this incarnation of Throg was originally the human known as Simon Walterson, who got turned into a frog and eventually was given powers identical to those of Thor. He is the leader of the Pet Avengers, a team of animal superheroes.
As part of his grand plan to trick Power Pack into going to Asgard and get the Golden Apples of Idunn for him, Loki send a pack of Wargs to attack the Pet Avengers in Central Park. Power Pack noticed the battle while on the roof of the hospital in which their Grandmother was hopitalized, and came to the Pet Avengers aid. Together they were able to subdue the Wargs. With the Wargs now under their command, Throg used his powers to open a gateway to Asgard for Power Pack.
Later, when Loki's plan accidentally set Ragnarok in motion and awoke the giant serpent Jormungand, the Pet Avengers travelled to Asgard to aid Power Pack and Thor in battle against the monster. Throg fought alongside Thor, Beta Ray Bill, and Alex, who was wielding Mjolnir and had thus been granted the powers of Thor.
Powers and Abilities
Seemingly those of Simon Walterson (Earth-616)#Powers.
As a former human, he is the only member of the Pet Avengers who can speak human tongue, whereas the others can only talk in animal speech. As such, he acts as an interpreter between his team mates and any humans they meet.