Mlp/undertale · 2:17am Jun 2nd, 2019
Thia is just an idea, and let it be known that once I've posted all my ideas there will be a vote one witch one should definitely be made.
Frisk - Flurryheart or Pumpkin
Undyne-Rainbow Dash
Alphey-Fluttershy
Mettaton- Rarity
Monster kid - scootaloo
Sans- Starlight
Papyrus-Trixie
Asriel/Flowey - Spike
Toriel-Cadance
Asgore-Shining armor
You know, I made a list for this ages ago. Here were my picks.
Frisk: Spike
Flowey: Chrysalis
Toriel: Celestia
Nabstablook: Moonlight Raven
Sans: Pinkie Pie
Papyrus: Applejack
Doggo: Gummy
Lesser Dog: Tank
Dogaressa: Mrs. Cake
Dogamy: Mr. Cake
Greater Dog: Winona (In heavy armor)
Shyren: Fluttershy
Monster Kid: Scootaloo
Undyne: Rainbow Dash
Angry Dummy: Sunshine Smiles (Because HAH!)
Gerson: Grand Pear
Random Temmies: Glitched Background Ponies
Shopkeeper Temmie: Derpy
Alphys: Twilight Sparkle
Grillby: Sunburst
Royal Guard 1: Flash Sentry
Royal Guard 2: Shining Armor
Muffet: ???
Brattie and Cattie: Aloe and Lotus
Burgerpants: Davenport
Mettaton: Rarity
Asgore: Luna / Nightmare Moon
Asriel: Cadence
Chara: Sombra
W. D. Gaster: Pony of Shadow
Some reasons are obscure, like how Applejack is implied to be related to Pinkie (maybe) and she's just earnest enough to be Papyrus... Though I could just as easily replace her with Limestone, I suppose, though she's a bit grouchy for that bag of bones.
How about making Cozy Glow Flowey? They both are seemingly innocent on the outside, but evil and twisted on the inside.