Undertale (True and the Rainbow Kingdom)

Frisk\Chara: True

Flowey\Asriel: Glummy Glooma

Toriel: Day Queen

Asgore: Rainbow King

Sans: Bartleby

Papyrus: Silverclaw

Undyne: Shadow

Monster Kid: Zee

Alphys: Mila

Mettaton (Box): Bingo Bango

Mettaton (Ex): Grizelda

Temmie: Frookie

Muffet: Night Queen