Mario vs. Kirby is a crossover game being made by Koopa Kastle Productions. It is about 5 characters from the Mario and Kirby series facing each other.
Mario is taking a walk when he meets up with Mallow and Peach. Mallow tells him that Nimbus Land got attacked by a giant penguin and that he needed help fighting him. Mario asked him why Peach was with Mallow and Mallow said that she was there when the penguin attacked them and the 2 of them escaped together. Peach then told Mario that he should also get some help just in case. Mario nods and heads off to find Geno.
Meanwhile, Kirby and Waddle Dee are relaxing by the beach when they see a monster hovering above the ocean in a big flying machine. The monster began hurling Bob-ombs at them. Kirby and Waddle Dee took off and dodged the Bob-ombs. But Waddle Dee tripped and went sprawling onto the sand. Kirby wheeled around and went back to help his friend but the monster was too close. It was just about to throw a Bob-omb at him when he suddenly disappeared in a flash of red light. He had been saved by Ribbon. Kirby then jumped behind a bush to hide from the monster. The monster gave up and left the beach. Kirby, Waddle Dee and Ribbon are curious as to where they came from so they decided to follow him.
Back in the Mushroom Kingdom, Mario was searching frantically for a path to Star Road, knowing that it would take him to Geno. Mario looked behind a bush and there was nothing there. He then heard a noise behind him and Waddle Dee popped up from out of nowhere with Kirby and Ribbon. He sees Mario and jumped into a hollow tree. Kirby and Ribbon hid behind a large rock. Mario then looked behind another bush and found a path to Star Road. He hopped onto it and went to Star Hill.
Mario arrived at Star Hill and looked around for Geno. Then, in the middle of a blue circle, stood Geno. He was in some kind of trance. Mario walked over to him and tried to get his attention. Geno turned around and greeted Mario. Mario then told him what had happened in Nimbus Land. Geno and Mario then dash off to meet up with Mallow and Peach.
Meanwhile, in Nimbus Land, the penguin is still destroying Nimbus Land.
- Waddle Dee
- King Dedede