Piplup

Super Mario Bros. franchise
Mario | Luigi | Princess Peach | Princess Daisy | Bowser | Bowser Jr. | Yoshi | Rosalina | Lumas | Captain Toad | Toadette | Pauline | Cappy | Paper Mario | Goombella | Dr. Mario | Mallow | Geno

Wario series
Wario | Waluigi | Ashley & Red | Mona | Kat & Ana

Donkey Kong series
Donkey Kong | Diddy Kong | Dixie Kong | Funky Kong | Cranky Kong

Legend of Zelda series
Link | Princess Zelda | Sheik | Impa | Young Link | Toon Link | Tetra | Midna | Tingle | Lana | Linkle

Metroid series
Samus Aran | Zero Suit Samus | Rundas

Kid Icarus series
Pit | Palutena | Dark Pit | Magnus | Viridi | Phosphora

Star Fox series
Fox McCloud | Falco Lombardi | Krystal

Fire Emblem series
Tiki | Marth | Celica | Roy | Lyndis | Hector | Ike | Chrom | Robin | Lucina | Tharja | Corrin | Azura | Takumi | Camilla

Kirby series
Kirby | King Dedede | Meta Knight | Bandana Waddle Dee | Magolor | Susie Haltmann

Pokémon franchise
Pichu | Pikachu | Charizard | Jigglypuff | Meowth | Ditto | Eevee | Mewtwo | Lugia | Blaziken | Gardevoir | Piplup | Lucario | Zekrom | Braixen | Greninja | Goomy | Decidueye | Incineroar | Vulpix (Alolan) | Lycanroc | Cynthia

Retro series
Ice Climbers | Little Mac | Duck Hunt | R.O.B. | Mr. Game and Watch | Excitebiker | Takamaru

Earthbound/MOTHER series
Ninten | Ana | Queen Mary | Ness | Paula Jones | Jeff Andonuts | Poo | Lucas | Claus | Flint | Hinawa | Kumatora | Boney

F-Zero series
Captain Falcon | Samurai Goroh | Jody Summer

Animal Crossing franchise
Villager | Isabelle

Pikmin series
Olimar | Pikmin | Louie | The President | Koppaites

Chibi-Robo series
Chibi-Robo

Custom Robo
Ray

Xenoblade series
Shulk | Fiora | Elma | Rex | Pyra | Mythra

Golden Sun series
Isaac | Felix

Splatoon series
Inkling | Squid Sisters | Cap'n Cuttlefish | Off the Hook | Agent 3 | Agent 8

ARMS series
Spring Man | Ribbon Girl | Min Min | Twintelle | Master Mummy

Main Characters:
Ash Ketchum | Pikachu | Misty | Brock | Tracey Sketchit | May | Max | Dawn | Iris | Cilan | Serena | Clemont | Bonnie | Kiawe | Lillie | Mallow | Sophocles | Lana | Jimmy

Allies: Professor Samuel Oak | Gary Oak | Officer Jenny | Nurse Joy | Todd Snap | Ritchie | Casey | Sakura | Drew | Steven Stone | Sanda | Zoey | Kenny | Barry | Looker | Riley | Lyra | Khoury | Professor Aurea Juniper | Trip | Bianca | Virgil | Georgia | N | Anthea and Concordia | Alexa | Professor Sycamore | Sawyer | Alain | Aria | Tierno | Shauna | Trevor | Clembot | Sanpei | Professor Kukui | Gladion

Relatives: Delia Ketchum | The Sensational Sisters | Flint | Norman | Caroline | Johanna | Chili | Cress | Grace | Meyer | Lusamine | Gladion

Top Trainers: Bruno | Clair | Lance | Maylene | Fantina | Candice | Cynthia | Diantha | Viola | Grant | Korrina | Ramos | Valerie | Olympia | Wulfric

Movie Characters: Meoldy | Maren | Diana | Towa | Bianca | Kidd Summers | Sir Aaron | Rafe | Jack Walker | Lizabeth | Alice | Maury

Pokemon: Mewtwo | Mew | Lugia | Ho-Oh | Entei | Celebi | Latias | Latios | Jirachi | Deoxys | Giratina | Darkrai | Azlef | Mesprit | Uxie | Shaymin | Arceus | Victini | Zekrom | Reshiram | Kyurem | Keldeo | Meloetta | Diancie | Zygarde | Pichu Brothers | Team Go-Getters | Team Poképals
Main Pokémon: Bulbasaur | Charizard | Squirtle | Butterfree | Totodile | Noctowl | Heracross | Sceptile | Infernape | Buizel | Snivy | Greninja | Goodra | Psyduck | Vulpix | Scyther | Blaziken | Beautifly | Skitty | Piplup | Buneary | Pachirisu | Ambipom | Axew | Excadrill | Dragonite | Pansage | Sylveon | Chespin | Bunnelby | Dedenne | Luxray | Turtonator | Togedemaru | Snowy | Sparky

Game Characters: Red | Ethan | Brendan | Nate | Rosa | Calem | Sun | Moon | Hau | Gloria | Keith | Kate | Summer | Murph

Teams
Team Plasma (Rood | Colress)
Team Flare (Malva)
Cipher (Ein | Eldes)

Playable Heroes
Banjo-Kazooie | Bayonetta | Bowser | Bowser Jr. | Captain Falcon | Chrom | Cloud Strife | Corrin | Daisy | Dark Pit | Diddy Kong | Donkey Kong | Dr. Mario | Duck Hunt | Eight | Erdrick | Falco | Fox McCloud | Greninja | Ice Climbers | Ike | Incineroar | Inkling | Isabelle | Jigglypuff | Joker | Ken | King Dedede | Kirby | Link | Little Mac | Lucario | Lucas | Lucina | Luigi | Luminary | Mario | Marth | Mega Man | Meta Knight | Mewtwo | Mii | Mr. Game and Watch | Ness | Olimar (Alph) & Pikmin | Pac-Man | Palutena | Peach | Pichu | Pikachu | Pit | Pokémon Trainer (Red | Leaf) (Charizard | Ivysaur | Squirtle) | Ritcher | R.O.B. | Robin | Rosalina & Luma | Roy | Ryu | Samus | Sheik | Shulk | Simon | Snake | Solo | Sonic | Toon Link | Villager | Wario | Wii Fit Trainer | Yoshi | Young Link | Zelda | Zero Suit Samus |

Assist Trophies
Alucard | Akira | Ashley | Bomberman | Chef Kawasaki | Dillon | Elec Man | Gray Fox | Guile | Isaac | Isabelle | Jeff | Jill | Kat & Ana | Knuckle Joe | Knuckles the Echidna | Krystal | Little Mac | Lyn | Magnus | Midna | Phosphora | Ray MK III | Riki | Rodin | Saki Amamiya | Samurai Goroh | Shadow the Hedgehog | Sheriff | Shovel Knight | Spring Man | Squid Sisters | Starfy | Sukapon | Takamaru | Tiki | Tingle | Waluigi | Yuri Kozukata | Zero |

Pokémon
Arceus | Blastoise | Celebi | Chansey | Charizard | Chespin | Darkrai | Dedenne | Deoxys | Ditto | Eevee | Entei | Fennekin | Gardevoir | Giratina | Ho-Oh | Inkay | Kyogre | Kyurem | Latias and Latios | Lugia | Marill | Meloetta | Meowth | Metagross | Mew | Munchlax | Oshawott | Palkia | Piplup | Raichu (Alolan) | Snivy | Snorlax | Tapu Koko | Vulpix (Normal and Alolan) | Zoroark |

Others
5-Volt | Bass | Beat | Boney | Cappy | Centurions | Cresselia | Dialga | Doc Louis | Dunban | Fiora | F.L.U.D.D. | Hal "Otacon" Emmerich | Ho-Oh | Krystal | Kumatora | Master Hand | Mega Man Series (Mega Man X | Mega Man Volnutt | Mega Man.EXE | Mega Man Star Force) | Mei Ling | Metal Mario | Paula Jones | Pauline | Peppy Hare | Pikmin | Poo | Proto Man | Registeel | Reshiram | Roy Campbell | Rush | Slippy Toad | Toad | Tom Nook | Viridi | Zekrom |