Eggman has built a disco-themed city in memory of his clubbing days as a youth.

the stage design is the same as Kalos Pokémon League in Smash 4 and Ultimate

https://drive.google.com/file/d/1rTE-trAe-ssUL6lQKFZpsqRXbp343nbn/view?usp=drive_link
https://drive.google.com/file/d/1PMY3MukwqbVYVX8ocLUAaviZNLcI-oUD/view?usp=drive_link

musics:
Discotopia Zone (Sonic Mania concept track) by Sonchu: https://youtu.be/0-rG0Mlkvro?si=gYZxLnUCb6OIKvzw
Stardust Speedway Good Future Remix by Jahn Davis: https://youtu.be/ivO-_cox-uw?si=zw9BntuIdfwrpvM6
Metallic Madness (Smash Bros Remix) by Lucas Pucas: https://www.youtube.com/watch?v=CjLdvVY1VSw&ab_channel=LucasPucas
Diamond in the Sky (ft Hatsune Miku) by yell0: https://youtu.be/zLfg05lhSX0?si=7fUxrsANVz89ePId
They call me Sonic : https://youtu.be/o-5iuLLZmtY?si=HOUvRE0GC1YeRg-z
Jeh Jeh Rocket (Sonic Rush) : https://www.youtube.com/watch?v=e5BG14-5WXA&ab_channel=DeoxysPrime