|This article is for the different forms that Larry takes on missions in different dimensions.|
Forms are sorted in the alphabetical order of the worlds, with unknown/unnamed worlds listed at the bottom.
Normal appearanceWhen he isn't zapped into another dimension, Larry is short with black hair and black eyes. He wears wide orange glasses, and he has a mustache. He wears a light pink shirt underneath a blue sweater vest with a diamond checker pattern. He also wears a purple tie, tan pants, and dark brown shoes.
In Alien World, Larry replaces a Kronad.
In Arabian World, Larry replaces a bandit.
In Ball World, Larry replaces a ping pong paddle.
In Cereal World, Larry replaces the Otis the Opossum, the cereal mascot of Banana Bran.
In Clown World, Larry replaces the evil clown Flaily.
In Demon World, Larry, substituting as part-time villain for a sick Rippen, replaces the dark overlord.
With his battle ax, Larry becomes more powerful, being able to trap the heroes in the ground with skeletons.
In Dinosaur Cowboy World, Larry replaces a bandit.
In Fairy World, Larry replace the fairy manager, Dr. Distraction.
In Galaxy World, Larry replaces a human wearing a metal suit and a jet pack.
In Giant Monster World, Larry replaces an ensign.
The Island City President's infatuation with him surprises him and terrifies him some.
In Knight World, Larry replaces a goblin minion.
In Musical Fairytale World, Larry replaces a female magic mirror.
A magic mirror, Larry can reveal the location of someone or relay an event in the past.
At the North Pole, Larry replaces a gingerbread man.
Being a gingerbread man with lots of different flavors, Larry finds himself delicious and eats himself.
In Ocean World, Larry replaces an octopus person.
Larry can swim and breathe underwater, though he is still able to breathe on land. He has eight tentacles, which he likes and loves using all of them for a high five.
In Old English World, Larry replaces Crossbow's second-in-command.
In Outer Space Court World, Larry replaces an alien.
In Plush Toy World, Larry replaces a giant baby.
In Space World, Larry replaces an alien.
Larry is excited about this form, thrilled to use his nose tentacles to smell his ears.
In Superhero World, Larry replaces a supervillain, Larrisite.
He is fused to a mech-suit that Rippen wears and has the power to steal powers from the superheroes by touching them and transfer them to Rippen. If the connection is broken, however, the powers Larry gave to Rippen return to the heroes they were taken from.
In Temple World, Larry replaces a temple thief.
In Zombie World, Larry replaces someone working for Brainzburgerz.
When Penn shoots a burger with a flare gun at the helicopter Larry and Rippen are in, the burger ends up going into Larry's mouth, turning him into a zombie. He still is talkative as a zombie, but it sounds like gibberish, annoying Rippen even more than when Larry's rants are understandable.
Other unknown worlds
- Larry replaces a mummy (seen in a photo in "Number One, Number Two")
- Larry replaces a giant centaur (seen on the poster)