One of Bowser's seven elite minions, male. He is the gatekeeper of World 1 and specializes in performing high jumps without stopping. He can also fire blue spheres with his magic wand to deal damage. 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 resides, is a grassland with small lakes and large mushrooms. 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 opponents. He wears sunglasses. He can also fire purple spheres with his magic wand to deal damage. 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 resides, 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 resides, 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 and firing rings with her magic wand 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 resides, 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 also fire green spheres with his magic wand to deal damage. 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 resides, 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 opponents. 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 resides, is a mountain made entirely of high stones with cliff views, where bullets called Bill Blasters fly around and clouds are visible. 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 hover in the air for a short time. He can also fire three blue spheres simultaneously with his magic wand to deal damage. 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 resides, is very cloudy and quiet, with a white landscape consisting only of clouds. It leads to World 8.

Bowser's son, male. He briefly encounters the user in World 4, 6, and 8. He fires fireballs from his mouth. He mainly 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 in Bowser's Castle located 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 a literal 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.