They're not bad...they're just drawn that way.
#1 Lilo and Stitch
#2 Jack Skellington and Sally Finklestein
#3 Syndrome and Mirage
#4 Buzz Lightyear
#5 The Powerpuff Girls
#6 The cast of Hey Arnold!
#7 Timmy Turner and his Fairy Godparents
#8 Kim Possible
#9 Cartman, Kenny, Stan, and Kyle
#10 The Brain
#11 Jessica Rabbit
#12 Popeye the Sailor Man (not the chicken restaurant)
#13 Fry, Leela, Bender, and Nibbler
#14 Dr. Zoidberg
#15 Darkwing Duck
#16 Teenage Mutant Ninja Turtles (and friends)
#17 Tinkerbell
#18 Rapunzel
#19 Pocahontas
#20 Alice
#21 Mulan
#22 Finn the Human
#23 Princess Bubblegum
#24 Jake the Dog
#25 Ice King and Gunther
#26 Marceline, the Vampire Queen
#27 Rocko's Modern Life
#28 Spongebob and Friends
#29 Vegeta, Prince of the Saiyans
#30 Frieza
#31 Meg Griffin
#32 Beavis and Butthead (from that Daria prequel)
#33 The Simpsons
#34 Charlie Brown
#35 Naruto and Sasuke
#36 Prince Zuko and Mai from Avatar: The Last Airbender
#37 Speedy Cerviche of the Samurai Pizza Cats
#38 Regular Show's Mordecai, Rigby, and Benson
#39 Calvin and Hobbes
#40 Daria Morgendorffer