Brother bear and his cub friends are upset that Sister Bear can beat the boys at baseball and other sporting activities. The boys get even more mad when she teases them about it, so Brother Bear and his friends decide to build a clubhouse that is just for the boys - "No Girls Allowed"!
During a visit to the Bear Country Fair, Too Tall Grizzly begins teasing Brother Bear and the two bears end up in a fight. This leads to a challenge of strength between Papa Bear and the big, mean, and strong Two-Ton Grizzly.
