Billy and Mandy vs JoJo's Bizarre Adventure Part 3

[Animeality]

My main objective here was imagining a scenario where Billy and Mandy had to deal with D'Arby, but I figured the crazy crap they survive and the presence of similar fighting ghosts matches the wackiness of Jojo.

The titular children and their best friend, Death, have become wrapped up in the quest of the Stardust Crusaders!

It all started on a regular day in Endsville. Billy was playing in the yard, Mandy was relaxing on a lawn chair waiting for Grim to bring her back some juice, and when Billy got bored and went inside he found his parents crumpled on the floor. There's evidence of vampire-related attack, much to Mandy's chagrin, and Grim (pulling out a fortune-telling device from his infamous trunk of supernatural horrors) learns that the only way to save Billy's parents is to travel to Cairo and defeat the man known as DIO.

In response to the danger, Lord Byram comes out of Billy's mouth to aid him, and Mandy gains access to Genghis Khan, Attila the Hun, and Abraham Lincoln. Yes, she has three Stands at once. Does the show's logic care? No, no it does not. So the gang arms up with all of their wacky abilities and equipment from across the series and buy a plane ticket to Egypt. On the way there, Grimm notices Gray Fly on the plane...

Assuming that:

• they had to fight their way through all of the enemy Stand users in the same order that the Joestar Faction had to
• ended up in most of the same locations
• they can all see Stands

Then how far can they get:

• If they start on a plane with Gray Fly?
• If they start directly after Polnareff?
• Or, if Grimm uses his scythe to portal them to Egypt and they only have to deal with DIO's second, elite batch of Stand users?
• If Hoss Delgado, Nergal, and Lord Pain join them as substitutes for Avdol, Polnareff, and Kakayoin?

[Guy1]

D'arby stomps. I doubt these three have anywhere near the brainpower to outsmart him. Mandy is only top dog in her universe because everyone there is weak.
Put her up against actual threats and she's done.

[master of read]

if even that. some of those stand users are damn powerful and busted.

[Guy1]

if even that. some of those stand users are damn powerful and busted.

Alessi alone would be a nightmare to fight.

[master of read]

Alessi alone would be a nightmare to fight.

i can see steely dan doing something, if he could get the jump on billy.

mariah would easily catch billy with her stand.

[Guy1]

i can see steely dan doing something, if he could get the jump on billy.

mariah would easily catch billy with her stand.

Can they even do anything to Sun or catch Hanged Man?