The Brothers are rivals to the leader of the pride named Half-Tooth, the episode's main protagonist.
They threatened Half-Tooth's leadership to the pride, and they work together against him. They ultimately chased him off as he backed down as they were too strong for him. They also killed his cubs and take over the pride.
Later, a ground sloth called Megatheruim killed one of the rival males, enabling Half-Tooth to return and challenge the remaining brother. After a brief but ferocious fight, the remaining brother was defeated and severally injured by Half-Tooth. The rival male fled and soon died from his wounds, thus ending the reign of The Brothers. His carcass gets scavenged by the Terror Birds.
- They are almost based on Scar from Disney's 1994 film, The Lion King, thought they didn't kill Half-Tooth to take the pride, only his cubs.