JoJo's Bizarre Adventure - I think it's more at home in this gallery imo.

Would Undyne be Hol Horse?

I imagine Frisk to be Jotaro and Adult Asriel from the Dreamer Reborn Tumblr page to be Star Platinum. Chara would more than definitely be DIO and Flowey to be The World. I can see Asgore to be Jonathon Joestar…or would Adult Asriel be Jonathon because of Hermit Purple being in the shape of thorns…?