Day 20: Koopasaurus (Bowser Jr. <> Boolossus) Outside, Mario finds a bunch of Koopas. They began to dance in strange circles, after which this monster comes out of the ground... KOOPASAURUS! He is the cause of the entire conflict, before the events of the game, this monster was captured by Elder T. Worth, as a result of which King Koopa entered the case. Koopasaurus eats the pile of that Koopas (in order to protect them from Mario), after which the hulk pounces on the plumber. In fact, this battle is somewhat reminiscent of the final battle with Bowser in the NSMBU, but there is one problem - before Mario can be hit on the head, he need to extinguish the fire on his head with water. But Koopasaurus is too huge to reach, so Mario need to make it slip and fall. deltarune king reference???? | Anime