There are many characters in the Cartoon House with it being a crossover.
The Secret Saturdays
Zak Saturday, Fiskerton, Komodo, Doc Saturday, Drew Saturday, Doyle Blackwell
Mario
Mario, Luigi, Princess Peach, Yoshi, Toads, Bowser, Bowser Jr., Koopalings, Princess Daisy, Wario, Kamek
The Legend of Zelda
Link, Toon Links (Green or Toon Link, Red, Blue, Vio), Zelda, Dark Link, Epona, Navi, Malon, Ganondorf, Great Deku Tree, Talon, Kokiri
Inuyasha
Inuyasha, Shippo, Miroku, Sesshomaru, Jaken, Kagome, Kikyo
Pokemon
N, Colress, Jordan (Summer), Ben, Mewtwo, Dialga, Ash Ketchum, Pikachu, Victini, Arceus, Mew, Mesprite, Uxie, Azelf, Palkia, Brock, Dawn, Crestelia, Darkrai, Rayquaza, Latias, Latios, Kyogre, Entei, Suicune, Raiku, Ghetsis, Leaf, Lucas, Reshiram, Zekrom, Celebi
Original Pokemon Characters
Chimo, Den, Piechu, Emboar, Surperior (Snivus), Minchino, Dew, Shawott, Chilla, Pup, Ma, Mo, Scampy, Gardevoir, Koru, Ashu, Den Jr., Yugata, Junino, Yuki, Reen, Gallade, Zoroark (Lucas'), Zoroark (Jordan's), Monferno, Charitard, Maritard, Airitard, Chimchar kids,
D.Grey Man
Allen Walker, Lenalee Lee, Levi, Konda, Timcampi
Golden Sun
Embless (Matthew), Tyrell, Rief, Karis, Amiti, Eoleo, Himi, Sveta, Issac, Garet, Ivan, Mia, Jenna, Piers, Felix, Sheba, Takeru, Blados, Chalis, Dora, Kyle, Captain Briggs
Kid Icarus
Pit, Dark Pit, Palutena, Viridi, Centurians, Hades, Medusa, Pyrrhon
Fire Emblem
Marth, Ike, Ethne (Female Robin), Chrom, Rakeplay (Male Robin), Sully, Frederick, Lon'qu, Panne, Lucina, Nowi
Sonic
Sonic, Shadow, Amy, Silver, Blaze, Knuckles
Kirby
Kirby, Waddle Dee, Waddle Doo, Flaming Leo
Samurai Warriors
Hanzo, Keiji, Kenshin, Kunoichi, Magoichi, Masamune, Mitsuhide, No, Nobunaga, Oichi, Okuni, Ranmaru, Shingen, Yukimura, Nagamasa, Ieyasu, Hideyoshi, Ina, Tadakatsu Honda, Ginchiyo, Kanetsugu, Kotaru, Mitsunari, Nene, Sakon, Gracia, Motochika, Toshiie, Masanori, Kai, Hanbei, Kanbei, Kiyomasa, Motonari, Muneshige, Ujiyasu, Aya,
Mother
Ness, Lucas
Death Note
L
The Legendary Starfy
Starfy
Epic Battle Fantasy
Matt, Lance, Natalie, Anna, NoLegs
Metroid
Samus
F-Zero
Captain Falcon
Sgt. Frog
Keroro, Kululu, Dororo
Minecraft
Steve, Creeper
Youtube
SkyDoesMinecraft
Flipnote Hatena
Gizmo, Anthony
The Pikachu Bros
Kiychu, Bluchu
Fullmetal Alchemist
Edward Elric, Alpholse Elric,
Original Characters
Kali, Julian, D-Wario, Ponce, Fairies (Ruby, Potion, Heart, Weapon, Life), Mirby, Ryan Manson, Kobe Manson, L, The Nothings (Nobody, Somebody, Anonymous, Everybody), Dark Harn, The King, Mario Jr., Luigi's daughter, Lucio, The Fangirls, Fart Part, Mirby, Keita, Franklin
Light and Dark Variations
Dark Mario, Dark Luigi, Dark Ness, Dark Lucas, Dark Sonic, Dark Peach, Dark Zelda, Chimechu, Greychu
Light Pit, Light Link, Light Ness