Obscure Nintendo Charactersさんのイラストまとめ

Protagonist
First appearance: Time Twist: Rekishi no Katasumi de... (FDS)
After having his fortune told, he visits the Demon Museum hoping to meet his dream girl. There he accidentally frees an ancient demon which steals his body, and he has to travel through time to get it back.

Hen
First appearance: Wario Land II (GB)
Wario's beloved pet hen. After being startled by the Black Sugar Gang, she flies away from her nest and Wario must return her. She also appears in the modern version of Fire Attack in Game & Watch Gallery 4.

Bean
First appearance: Mobile Golf (GBC)
The first opponent you'll face in the game. He's still a child, but considers himself a full-fledged cowboy. Practices golf at the ranch every day.

Carrie Caster
First appearance: Drill Dozer (GBA)
Known as the most ruthless detective in the police force. She originally tries to arrest Jill, but after realizing the other police were acting suspiciously she ends up helping her escape from prison and take down the Skullkers.

Spirit of Kindness
First appearance: Yoshi Topsy-Turvy (GBA)
The spirit guarding chapter 5 of the Forbidden Pop-Up Book. She treasures kindness above everything, and challenges Yoshi to complete her courses while defeating as few enemies as possible.

Ziggy
First appearance: Squish (Game & Watch)
Ziggy the Mazeman is lost in a maze, and has to stay alive as long as possible while a creature known as Grumpy tries to squash him by moving the maze's walls.

Dotty
First appearance: Snapdots (DSiWare)
A curious alien girl who came to Earth from a faraway planet. She guides you through the tutorial, and has a unique comment for every puzzle in the game.

Caroline
First appearance: Super Famicom Wars (SNES)
A powerful, independent CO not affiliated with any nation in particular. Her strength comes from her immense luck, earning her the nickname "Lucky Girl".

Lyra
First appearance: HarmoKnight (3DS)
A soldier of Melodia who uses her harp like a bow to shoot notes at distant foes. She accompanies Tempo on his journey, occasionally taking his place as the player character.

Spotto
First appearance: Spotto! (DSiWare)
The president's daughter has been kidnapped by ghosts, and Spotto must save her... by throwing bombs in their mouths. He's only called Spotto in the US release; elsewhere it's the name of his squad, and the trooper himself goes unnamed.