He is voiced by Eric Edelstein as adult, who also voices B.O.B. from Monsters vs. Aliens TV Show and Sam Lavagnino as cub, who also voices Rolly from Puppy Dog Pals.
Grizzly is an anthropomorphic grizzly bear. His entire body is completely covered in brown fur. Grizzly, though shorter than his brother Ice Bear, has more girth than his siblings.
Grizzly is the one who acts like the leader. Out of the three bears, he stands out the most and sets good examples for his brothers. He also mostly always loves food. He wants a lot of friends to hang out with. He likes attention and wants to be internet famous. He loves his brothers and when they were in trouble in the episode, "Our Stuff", he said they would go through it together. He is probably the most outgoing out of his brothers. He has been shown to be a quick thinker, as seen in the episode "Food Truck," when he figures out the flash on Panda's phone can be used to temporally blind woodland creatures.