1 Yo (Fanboy and Chum Chum)
2 J.D. (Robot and Monster)
3 Beavis (Beavis and Butt-Head)
Beavis is a fictional character. He is one of the young teenaged protagonists on the MTV animated series Beavis and Butt-head.
4 Flapjack (The Marvelous Misadventures of Flapjack)
He looks awesome to me, I love this show's art style.
5 Clutch Cargo (Clutch Cargo)
6 King Ramses (Courage the Cowardly Dog)
The blue creature is weirder. At least King Ramses is human, the blue creature is vaguely human at best.
7 Oro (Dinosaur Adventure)
8 Butt-Head (Beavis and Butt-Head)
9 Uncle Grandpa (Uncle Grandpa)
10 Weegee (Mario is Missing)
11 Monster Krumholtz (Robot and Monster)
12 Plankton (SpongeBob SquarePants)
Sheldon James Plankton, or simply Plankton, is a character in the Nickelodeon animated television series SpongeBob SquarePants.
Plankton's really funny he does look weird though like every SpongeBob character.
13 Jimmy (Ed, Edd n' Eddy)
14 Sanjay (Sanjay and Craig)
15 Kyle Broflovski (South Park)
Without his hat he looks weird. - cosmo
16 Waffles (Catscratch)
17 Mailbox (Blue's Clues)
18 Krumm (AAAHH!!! Real Monsters)
19 The Blue Thing (Courage the Cowardly Dog)
It's a trumpet guys. A nightmare version of a trumpet. THAT's why it's vaguely human and vaguely alien.
But yea before that episode was aired the likes of this didn't exist, except possibly in drawings and renditions of demons.
20 Beast Boy (Teen Titans/Teen Titans Go)
Beast Boy is a fictional superhero appearing in American comic books published by DC Comics, usually as a member of the teams Teen Titans and Doom Patrol. Created by writer Arnold Drake and artist Bob Brown, he first appeared in The Doom Patrol #99.
In the original beast boy was funny and smart but he cares for his teammates in teen titans go he's really stupid doesn't care about everyone but playing video games
21 Maggie (The Simpsons
22 Boog (Fanboy & Chum Chum)
23 Winsome Witch (Winsome Witch)
24 The Map (Dora the Explorer)
25 Mr. Blik (Catscratch)
26 Ren Höek (Ren & Stimpy)
27 Beverly Bighead (Rocko's Modern Life)
28 Bloaty and Squirmy (Rocko's Modern Life)
29 Filburt (Rocko's Modern Life)
Filburt Shellbach is a main and supporting character of the cartoon Rocko's Modern Life and the comic book series of the same name.
30 Steven (Steven Universe)
31 Pizza Steve (Uncle Grandpa)
32 Coconut Fred (Coconut Fred's Fruit Salad Island)
33 Zoidberg (Futurama)
34 The Noid (Domino's Pizza)
35 Nick (Big Mouth)
36 Leela (Futurama)
37 Ed (Ed Edd n Eddy)
Ed is one of the three protagonists in the Canadian-American animated comedy television series Ed, Edd n Eddy. He is the strongest and the least intelligent member of the Eds.
38 Edd (Ed Edd n Eddy)
Edd, mostly referred to by his nickname "Double D," is one of the three protagonists in the Canadian-American animated comedy television series Ed, Edd n Eddy. He is the physically weakest but the most intelligent member of the Eds.
39 Plank (Ed, Edd & Eddy)
40 Dib (Invader Zim)
41 Gaz (Invader Zim)
42 GIR (Invader Zim)
43 Mamoo (Super Duper Sumo's)
44 Kimo (Super Duper Sumo's)
45 Booma (Super Duper Sumos)
46 Meg (Mega Babies)
47 Derrick (Mega Babies)
48 Buck (Mega Babies)