Notes:

The fighters of Super Smash Bros. Ultimate redrawn in various animation styles (each of which can be viewed individually on DeviantArt).

Styles as he wrote in the description:
Mario x Dragon Ball Z
Donkey Kong x Gorillaz
Link x Adventure Time
Samus x Invader Zim
Dark Samus x The Nightmare Before Christmas
Yoshi x Dr. Seuss
Kirby x Blues Clues
Fox x Bojack Horseman
Pikachu x Digimon
Luigi x Danny Phantom
Ness x Peanuts
Captain Falcon x Batman the Animated Series
Jigglypuff x My Little Pony
Peach x Walt Disney
Daisy x Star vs the Forces of Evil
Bowser x Popeye
Ice Climbers x South Park
Sheik x Scott Pilgrim
Zelda x Steven Universe
Dr Mario x Rick and Morty
Pichu x The Powerpuff Girls
Falco x Duck Tales 2017
Marth x Shin-chan
Lucina x Kim Possible
Young Link x Dora the Explorer
Ganondorf x Samurai Jack
Mewtwo x Ben 10
Roy x Avatar the Last AIrbender
Chrom x Bob Burgers
Mr. Game and Watch x Spy vs Spy
Meta Knight x The Grim Adventures of Billy and Mandy
Pit x My Hero Academia
Dark Pit x Panty and Stocking
Zero Suit Samus x The Jetsons
Wario x Ren and Stimpy
Snake x Archer
Ike x Star Wars the Clone Wars
Pokemon Trainer x Fosters Home for Imaginary Friends
Diddy Kong x Tiny Toon Adventure
Lucas x Gravity Falls
Sonic x Regular Show
King Dedede x Cow and Chicken
Olimar x The Smurfs
Lucario x Lilo and Stitch
R.O.B S x Futurama
Toon Link x The Misadventures of Flapjack
Wolf x Swat Kats
Villager x Over the Garden Wall
Megaman x My Life as a Teenage Robot
Wii Fit x Family Guy
Rosalina x The Fairly Odd Parents
Little Mac x The Simpsons
Greninja x Teenage Mutant Ninja Turtles
Mii Fighters x Ed Edd n Eddy
Palutena x DC Super Hero Girls
Pacman x Chalk Zone
Robin x Sabrina
Shulk x Kill la Kill
Bowser Jr x Rugrats
Duck Hunt x Looney Tunes
Ryu x OK KO Lets Be Heroes
Ken x Johnny Bravo
Cloud x Teen Titans
Corrin x American Dragon Jake Long
Bayonetta x Daria
Inkling x Codename Kids Next Door
Ridley x Courage The Cowardly Dog
Simon x He-man Masters of the Universe
Richter x Jojo's Bizarre Adventure
King K Rool x One Piece
Isabelle x Rocko's Modern Life
Incineroar x El Tigre the Adventures of Manny Rivera
Piranha Plant x Beavis and Butthead
Joker x Scooby Doo Mystery Incorporated
Hero x Sailor Moon
Banjo & Kazooie x Winnie the Pooh
Terry x King of the Hill