Sonic x Helluva Boss: Allies/friends/Rivals
Sonic's Universe:
Tails: episode 11
Knuckles: episode 11
Amy: ?
Silver: ?
Blaze: ?
Shadow: ?
Rouge: ?
Omega: ?
Whisper: ?
Tangle: ?
Espio: ?
Vector: ?
Charmy Bee: ?
Jet: ?
Wave: ?
Storm: ?
Vanilla: ?
Cream and Cheese: ?
Gemerl: ?
Chip: ?
Helluva/Hazbin's Universe:
Blitzo: Allied
Moxxie: Allied
Millie: Allied
Loona: Allied
Stolas: In the Future later
Octavia: In the Future later
Mrs. Mayberry: In the Future later
Verosika Mayday: In the Future later
Verosika's Crew: In the Future later
Vortex: In the Future later
Sallie May: In the Future later
Charlie: In the Future later
Vaggie: In the Future later
Angel Dust: In the Future later
Alastor: In the Future later
Barbie Wire: In the Future later
Asmondeus: In the Future later
Fizzarolli: In the Future later
Husk: In the Future later
Cherri Bomb: In the Future later
Lucifer Morningstar: In the Future later
Lilith: In the Future later
Niffty: In the Future later
Beelzebub: In the Future later