One of Bowser's seven elite minions, male. He is the gatekeeper of World 1 and specializes in jumping high without rest. He can deal damage by firing blue spheres from the magic wand he carries. If jumped on, Larry takes critical damage, retreats into his shell, and remains silent for a moment before coming back out. World 1, where Larry is located, is a grassland with small lakes and giant mushrooms growing. It leads to World 2.

One of Bowser's seven elite minions, male. He is quite large. He is the gatekeeper of World 2 and specializes in jumping and performing a ground stamp attack to stun enemies. He wears sunglasses. He can deal damage by firing purple spheres from the magic wand he carries. If jumped on, Roy takes critical damage, retreats into his shell, and remains silent for a moment before coming back out. World 2, where Roy is located, is a hot desert setting with pyramids, cacti, and rolling barrels. It leads to World 3.

One of Bowser's seven elite minions, male. He is the gatekeeper of World 3 and is characterized by summoning large yellow bouncy balls with his magic wand. He is very short. If jumped on, Lemmy takes critical damage, retreats into his shell, and remains silent for a moment before coming back out. World 3, where Lemmy is located, is a snowy field setting with lots of ice and falling snow. It leads to World 4.

One of Bowser's seven elite minions, female. She is the gatekeeper of World 4 and is characterized by creating rings with her magic wand to fire them and being able to breathe underwater. If jumped on, Wendy takes critical damage, retreats into her shell, and remains silent for a moment before coming back out. World 4, where Wendy is located, is a beach with palm trees. It leads to World 5.

One of Bowser's seven elite minions, male. He is the gatekeeper of World 5 and is very mischievous. He can deal damage by firing green spheres from his magic wand. If jumped on, Iggy takes critical damage, retreats into his shell, and remains silent for a moment before coming back out. World 5, where Iggy is located, is a dense forest. It leads to World 6.

One of Bowser's seven elite minions, male. He is the gatekeeper of World 6 and specializes in jumping and performing a stamp attack to stun enemies. As a side note, he is the largest and strongest minion excluding Bowser. If jumped on, Morton takes critical damage, retreats into his shell, and remains silent for a moment before coming back out. World 6, where Morton is located, is a mountain made entirely of high stone with cliff scenery, flying bullets called Bill Blasters, and visible clouds. It leads to World 7.

One of Bowser's seven elite minions, male. He is the gatekeeper of World 7 and is characterized by being able to float in the air for a short time. He can deal damage by firing three blue spheres simultaneously from his magic wand. If jumped on, Ludwig takes critical damage, retreats into his shell, and remains silent for a moment before coming back out. World 7, where Ludwig is located, is very cloudy and quiet, with a white landscape consisting only of clouds. It leads to World 8.

Bowser's son, male. He encounters the user briefly in Worlds 4, 6, and 8. He fires fireballs from his mouth. He mostly travels in a cylindrical flying vehicle with a propeller.

The final boss and Bowser Jr.'s father, male. He has a body even larger than Morton's. He attacks in various ways, such as shooting fireballs from his mouth, throwing hammers, or jumping. He is located in Bowser's Castle in World 8, where he keeps Princess Peach imprisoned. World 8 is a red, hot place with lava and volcanoes. Bowser cannot be defeated by jumping on him. It is literally a physical battle.

Close with Mario and Luigi. She is the princess living in Peach's Castle located in World 1. She secretly likes Mario and has faith that Guest will rescue her even if she is kidnapped by Bowser's gang. She is kind and calm.