Mugly

Kremlings
King K. Rool | Kaptain Skurvy | Kritter | Klump | Kip | Kass | Kalypso | Kludge | Krusha | Kudgel | Congazuma | Kackle | Klaptrap | Klobber | Koin | Kosha | Kerozene | Kopter | Kuff 'n' Klout | Kutlass | Mega Amp | Dragon Kremling | Kloak
Allies: KAOS | Very Gnawty and Really Gnawty | Master Necky and Master Necky Snr. | Queen B. | Dumb Drum | Flotsam | Clambo | Krow | Kleever | Zinger | Gnawty | Army | King Zing | Manky Kong | Slippa | Belcha | Arich | Squirt | Bleak | Barbos

Tiki Tak Tribe
Tiki Tong | Kalimba | Gong-Oh | Maraca Gang | Wacky Pipes | Cordian | Banjo Bottom | Xylobone | Tiki Tong Tower | Tiki Goon | Screamming Pillar | Tiki Buzz | Tiki Pop | Tiki Bomber | Tiki Tank | Tiki Seeker | Tiki Torch | Tiki Boing
Allies: Mugly | Scurvy Crew | Stu | Mole Train | Mangoruby | Thugly | Colonel Pluck | Awk | Toothberry | Squeeklys | Snaps | Chomps | Snaggles | Squiddicus | Robo-Hand Operator

Snowmads
Lord Fredrik | Pompy | Skowl | Ba-Boom | Fugu | Bashmaster | Tuck | Waldoughs | Hootz | Fluff | Lemmington
Allies: Dozy | Buffaloafer | Schnautzel | Swooper Dooper | Ice Dragons

Others
Fire | Snapjaw | Mario | Cranky Kong | Donkey Kong | Wizpig | Krunch | Crazy Kong | Fire Necky | Sassy Squatch | Davy Bones | B. Locker | Krosshair | Kroctopus | Kong Fu | Cactus/Ghastly King | Hogs | Tusks | Roc | Dread Kong | Karate Kong | Ninja Kong | Sumo Kong | Ninjape | Iguanagon | Smokey the Dragon | Bluey the Walrus | Bubbler the Octopus | Tricky the Triceratops | Army Dillo | Dogadon | Mad Jack | Puftoss | King Kut Out | Hard Hat | Screech | Polly Roger | Chomps | Klubba | Rabbid Kong

Subspace Army
Ancient Minister | Bowser | Bullet Bills | Duon | Shadow Bugs | False Bowser | False Diddy Kong | False Peach | False Samus | False Zelda | Galleom | Ganondorf | Goombas | Hammer Bros | King Statue | Koopa Troopas | Master Hand | Petey Piranha | Primids | Rayquaza | Ridley/Meta Ridley | Porky Minch | Tabuu | Wario

World of Light
Crazy Hand | Dharkon | Dracula | Galeem | Galleom | Ganon | Giga Bowser | Master Hand | Marx | Rathalos

Playable Characters
Bowser | Bowser Jr. | Dark Pit | Dark Samus | Donkey Kong | Ganondorf | Incineroar | Ken | King Dedede | King K. Rool | Koopalings (Larry, Roy, Wendy, Iggy, Morton, Lemmy, Ludwig) | Luigi | Meta Knight | Mewtwo | Piranha Plant | Ridley | Robin | Ryu | Wario | Wolf O'Donnell

Bosses
Crazy Hand | Dark Emperor | Dharkon | Dracula | Duon | Galeem | Galleom | Ganon | Giga Bowser | Marx | Master Hand | Master Core | Metal Face | Petey Piranha | Porky Minch | Rathalos | Rayquaza | Ridley | Tabuu | Yellow Devil

Assists Trophies/Poké Ball Pokémon
Andross | Arceus | Black Knight | Burrowing Snagret | Chain Chomps | Chef Kawasaki | Darkrai | Deoxys | Devil | Dr. Wily Entei | Elec Man | Ghirahim | Giratina | Ghosts | Gray Fox | Hammer Bros | Klaptrap | Knuckle Joes | Kyurem | Lakitu | Metroid | Meowth | Mimikyu | Lord Nightmare | Mother Brain | Palkia | Phosphora | Shadow the Hedgehog | Skull Kid | Starman | Unown | Waluigi

Trophies/Spirits/Stickers
Acro | Affinity | Agahnim | Air Man | Akuma | Alraune | Albert Wesker | Andrew Oikonny | Antasma | Aparoids | Aparoid Queen | Arlon | Ashnard | Baba | Baby Bowser | Babylon Rogues (Jet the Hawk, Wave the Swallow, Storm the Albatross) | Balrog | Banzai Bills | Bass | Big Boss | Bio Rex | Birdo | Black Shadow | Blood Falcon | Bokoblins | Blipper | Bloopers | Bombers | Bomb Man | Bonkers | Boos | Boom Boom | Boom Stompers | Box Boxer | Boxy | Broom Hatters | Bugzzy | Bumpety Bombs | Bulborbs | Bullet Bills | Burt the Bashful | Byrne | Cackletta | Calamity Ganon | Camus | Cappys | Captain Syrup | Carmilla | Chandelure | Chaos | Chaos Kin | Chargin' Chucks | Claus | Clubberskulls | Colonel Pluck | Crash Man | Count Bleck | Count Cannoli | Cut Man | Daphnes | Dark Man 4 | Dark Matter | Dark Mind | Darknuts | Daroach | Deadly Six (Zavok, Master Zik, Zeena, Zomom, Zazz, Zor) | Death | Deathborn | Demise | Demon King Arzodius | Diggernaut | Dimentio | Dive Man | DJ Octavio | Don Bongo | Donkey Kong | Dragaux | Dr. Ivo "Eggman" Robotnik | Drill Man | Dry Bones | E-123 Omega | Edelgard | Eggplant Wizard | EggRobo | Emerl | Erazor Djinn | Father Balder | Fawful | Fiery Blowhog | Fire Man | Flages | Flash Man | Fortitudo | Fynalle | Gaius | Gangrel | Galacta Knight | Galaxy Man | Guardians | Garon | Gengar | General Guy | Geese Howard | Gharnef | Ghosts | Gleeok | Goda | Gold Bone | Golems Gomorrah | Goombas | Gooper Blooper | Gordos | Goro Akechi | Gravity Man | Great Reaper | Grief | Gruntilda | Guts Man | Hades | Hard Man | Hawke | Helmaroc King | Hewdraw | Hooktail | Hoopa Unbound | Hot Heads | Ice Man | Igor | Infinite | Ing | Inspired | Iori Yagami | Iridescent Glint Beetle | Jade Face | Jeanne | Julius | Juri Han | Kalypso | Kamek | Kammy Koopa | Kanden | Karate Kong | Kass | King Bob-omb | King Boo | King Dice | King Dodongo | King Hippo | King Knight | Kip | Kludge | Knight Man | Koopa Paratroopas | Kraid | Kracko | Kritters | Kyle Merkulov | Leon Powalski | Lethiniums | Liquid Snake | Loptr | Lord Fredrik | Lurchthorns | Lyon | MB | M. Bison | Magolor | Mahvas | Majora | Malladus | Master Belch | Medeus | Medusa | Megontas | Meta-Knights (Axe Knight, Javelin Knight, Mace Knight, Trident Knight, Blade Knight)| Metal Man | Metal Sonic | Metroid Prime | Mimicuties | Moblins | Mockiwis | Moley | Monoeyes | Mouser | Mr. Frosty | Mr. Sandman | Mr. Shine and Mr. Bright | Mugly | Nabbit | Napalm Man | Natah | Necrozma | Nihilego | Nightmare | Ninja Kong | Noxus | Nruffs | Nutskis | O'Chunks | Octoman | Octoroks | Ornes | Pandora | Panther Caroso | Parasite Queen | Paz Ortega Andrade | Peckish Aristocrabs | Phantom Ganon | Pigma Dengar | Pigmasks | Plague Knight | Plasma Wisps | Plasm Wraith | Pom Pom | Pompy | Poppy Bros Jr.s | Princess Shroob | Quaggled Mireclops | Queen Metroid | Queen Sectonia | Quick Man | Rabbid Kong | Rabbids | Raphael the Raven | Reapers | Redd | Rhea | Revolver Ocelot | Ridley Robot | Risky Boots | Rockys | Rodin, the Infinite One | Roger the Potted Ghost | Rouge the Bat | Ryuichi and Ryuji | Sagat | Scarfies | Scurvy Crew | Shadow Beasts | Shadow Man | Shadow Queen | Shaft | Shake King | Sheegoth | Shield Knight | Shotzos | Shroobs | Shy Guys | Sidesteppers | Sir Kibbles | Sigma | Skull Man | Skuttlers | Slash Man | Slimes | Smoky Prog | Snake Man | Snowmads | Solidus Snake | Space Pirates | Spark Man | Specknoses | Specter Knight | Spire | Squeakers | Starmans | Stu | Sword Man | Swooping Snitchbug | Sylux | Tacs | Tatanga | Thanatos | Tharja | The Devil | Therion | The Three Mage-Sisters (Francisca, Flamberge, Zan Partizanne) | Tiki Tak Tribe (Kalimba | Gong-Oh | Maraca Gang | Wacky Pipes | Cordian | Banjo Bottom | Xylobone) | Tiki Tong | Top Man | Trace | Turret Tusk | Twinrova | Ultimate Chimera | Vaati | Validar | Vega | Viridi | Viruses | Vivian | Vorash | Waddle Dees | Waddle Doos | Walhart | Walkys | Wart | Weavel | Wheelies | Whispy Woods | Whomps | Wiggler | Wind Man | Wollywog | Wood Man | Xord | X-Parasites | Yaldabaoth | Yuga | Yveltal | Zangief | Zant | Zero | Zingers | Zoda | Zurees

Others
Billy Kane | Heihachi Mishima | Ryuji Yamazaki | Solon | Team Rocket Grunts | Yiga Foot Soldiers