Surprised I hadn't revived this topic earlier.
(By me if not otherwise noted)
Captain Falcon00 - Harvey Birdman (Default)
02 - Green Lantern by zephyrnereus-SamuraiStorm (green)
03 - Space Ghost by chaotix000 & stevetv (blue)
05 - Ronald by MasterHand(pink)
Dedede02 - Tux (Green)
06 - Kamek by marvin (Pink)
Falco00 - Toucan Sam by MeowMix (Original)
02 - Perry (Green)
03 - Birdy (Blue)
04 - Black N' Blue (Black)
05 - Sanji by papersak (Yellow)
Fox02 - Cursed by fireking220 (Green)
04 - Borg (Black)
05 - Sajin Komamura (White)
Game & Watch03 - Hot Pink
06 - Inverse
Ganondorf02 - Dark by Chaotix000 (Green)
03 - MadWorld (Blue)
Ike01 - Sabrac (Red)
02 - Naruto by Marvin (Green)
03 - Simon(Blue)
04 - Ichigo Kurosaki by dragonrage (Another Green)
05 - Kamina (Yellow)
Kirby00 - Super Pissed by AngelGlory
01 - Hacker (Red)
02 - Pixel Kirby by Zephron (Green)
03 - Bomberman (Blue)
04 - Bob-omb (Yellow)
05 - Bomb Boo (White)
Luigi - Mr. K by Oizen X
Koopa03 - Cosmic by Marcov15 (Blue)
04 - BlackN'Blue (Black)
Link01 - Sniper by Segab (Red)
03 - Neji by Poxag(Blue)
05 - Fierce Deity by Marvin (White)
06 - Twilight by Cursed Portal (Yellow)
Lucario01 - Brack by kwrk85 (Red)
02 - Renamon by Zeckneji (Green)
04 - Egyptian Jackal Joey90 (Light Blue)
05 - Raccario (White)
Lucas00 - Travis Touchdown (Default)
03 - Vivi by Zephron (Blue)
Luigi01 - Mr. L (Red)
03 - Tuxedo by MasterHand (Blue)
05 - Shunsui Kyoraku (Orange)
Mario02 - Tron (Green)
03 - Twilight by Cursed Portal (Jumpman)
04 - TF2 Engineer by Pako1034 (Wario)
05 - Shadow Mario by pako1034(black)
06 - KFC by dapuffster (Fire)
Marth01 - Zero by papersak (Red)
02 - Riku by Vyse(Green)
03 - Edward by OizenX(Blue)
04 - Lulu Zero (Black)
Metaknight01 - Count Bleck (Red)
02 - Nazo Koumori (Green)
05 - Galacta by Stacksmash (Pink)
Ness06 - Fierce Deity by finman702 (black)
Peach01 - Random Sister I by Marcov15 (Red)
02 - Miku by papersak (green)
03 - Nia by exfatal (blue)
04 - ARACHNÉ by krlosf (White)
Pikachu01 - BlackN'Blue
02 - TTGL Boota
03 - Kilachu by Marvin
Pikmin & Olimar05 - Orange Bulborb by Canon98 (Dirty Helmet)
Pit01 - KPit by KFox(Red)
02 - Green Arrow by finman702 (Green)
03 - Toshiro Hitsugaya (Blue)
Etc - Green Arrows by finman702
FS - Deathnote
Pokemon & Trainer01 - Dark by mnsg (Red)
04 - Copycat by catgowoof (Light)
Ice Climbers04 - Ice Mages by Stevetv (Dark)
Jigglypuff00 - Super Pissed by AngelGlory
01 - Awesome by Pako1034 (Flower)
04 - Taffy by Progg (Trainer Hat)
R.O.B.03 - Black N' Blue (Blue)
04 - Circuit by Plasmakirby (Pink)
Samus02 - Shining Death by LZ (Green)
04 - ???? Samus by Marcov15 (Purple)
Sheik01 - Midna by Marvin (Red)
Snake02 - Kakashi by Marvin (Green)
03 - Hard Gay by inferno (Blue)
Sonic01 - Shadow by Marvin (Red)
02 - Darkspine by Moosehunter (Green)
Zero Suit Samus01 - Yoko by Ike Lawliet (Pink)
Toon Link04 - Adeline by segab (Purple)
05 - Mama by alexjol (NES)
Wario01 - Eggman by Marvin (Red)
Wolf04 - Amaterasu by segab (Red & White)
Yoshi01 - Cookie by papersak(Red)
03 - Dino by papersak (Blue)
04 - Dry (Yellow)
05 - Black (Pink)
Zelda03 - Devil Zukin by papersak (Blue)
01 - Midna by Cursed Portal (Red)
StagesCRAYON - Yoshi's Apocalypse
DONKEY - Vivi's 75m
ICE - Rainbow Sumit by tjmsrubegoldberg
KART - Rainbow Road by Segab
MANSION - Luigi's Mansion... Hell
MARIOPAST_01 - Yoshi's Island cave by MidnightShaymin :
PICTCHAT - Dark Themed by josegallardo89
EtcCoin Shooter - Catgirl
Nintendog - Demon Nintendog
MusicShop Channel - Southern Cross by Shadow