User blog comment:LoudHouseFan777/Extended Ending for Brawl in the Family/@comment-27643442-20180428110841

the part where the sisters were sentenced to hugging each other and saying they're friends again is a reference to an episode of Clarence (2014) (specifically, Jeff's New Toy), where Sumo (one of Clarence's best friends) sentenced him and Jeff (another one of Clarence's best friends) to shake each other's hands and saying they're friends again. Reference here: New Toy http://clarence.wikia.com/wiki/Jeff%27s_New_Toy