28 characters

A lot of characters made by me!

Grimmy the grim reaper: the fella with a black coat and red eyes and mouth
Batty the wingless bat: next to Grimmy holding a flower(yes, he likes flowers)
Minimi: Batty's pet just under Batty
Spikoe: the orange deformed T-Rex that a lot of people say he's cute
Scorpion: the dude who has a red body with a tail
Hockey Stick the alien: the cool alien with a hockey stick
Holey Smokes: A robot with one blue eye
Robo Steve: the red robot with a long nose
Black Face: orange coat with yellow eyes
Beno the Mexican jumping bean: above Black Face with a hat(kinda hard seeing the face since I did the line art big)
Beano the magic walking bean: Above Grimmy that's a bean!
Buck the rabbit: the Rabbit with big teethe
Ratty the rattish: the girl with a skull on her outfit
Kingy: just squished in with a crown
Drad Cat: The cat that stuck out his tongue
Tiger Cat: She's holding Drads hand so his finger doesn't poke her
Edward Willingston: the guy whoes doing the wiggly dance or is in light blue
Celia Cat: the pink cat reading a book
Mr. Card: the bird that's a teacher
Giant Bug: the insect that's big and next to Guardo
Guardo: The big reptile dude that has armor
Alien Queen Zeria: The tallest character with long pink dress
Lil' Guy: the small guy looking up at the Alien Queen
Motty: the guy who's in the air onto the left
Louie Douie: the Happy Face dude
Party Ghost: Ghost dude on the right
*LAST* PE Teacher: a mean looking dog that you don't want as a your PE Teacher

All characters (C) to me