The Pet War is a war that took place from August 25, 2020, to September 9, 2020, in which members of L’Manberg fought against members of the Dream Team due to the fact that Sapnap had killed many of L’Manberg’s precious pets.

Sapnap first killed Niki’s fox, Fungi, by “accident”. and also ended up killing Tommy’s pet cow, Harold, thinking it was a random cow. Tommy and Niki teamed up to take Sapnap’s fish, Mars and Beckerson, thinking both were Sapnap's pets but Beckerson was actually George’s. After Dream learned about the kidnappings of the fish, he logged on and asked for them back, Niki however, didn't want to give them back until they at least got an apology. Sapnap then came on and apologised but Niki was still angry. They decided to give the fish back to Dream.

Fundy, however, was furious about Fungi’s death as he had been the one to gift it to Niki. Fundy was able to manipulate Niki into killing Sapnap's favourite fox, Sketchers. In his wrath of anger, Sapnap killed Fundy's Enderman and also took and burned the diamond block on Fungi's grave. Fundy later hosted the "Bee Game" which ended in Punz’ pet bee, Beenus, dying and officially declaring war against the Dream Team. Fundy even went as far as taking the rest of the Dream Team’s pets hostage. Upon finding out, Sapnap blew up Fungi’s grave and Fundy finally decided to settle this down with a duel.

The next day the duel took place and after three fights, Sapnap won, getting the Dream Team pets back and Fundy accepting his fate.