Both Helluva Boss and Hazbin Hotel crew are chilling in hell when they're teleported into Indigo Park and it's abandoned and the TV lights up and it reveals Rambley the Raccoon

Rambley The Raccoon: Hi there, and Welcome to Indigo Park the world's most fun innovative and engaging family fun experience, step into the world of your favorite charact...

Rambley The Raccoon then notices

Rambley The Raccoon: Hey, You're our first customers in 2920 days, 4 hours, 23 minutes, and 38 seconds, Congratulations, I'm Rambley, Rambley the Raccoon! And it's my job to make sure your experience here at Indigo Park is the most fun it can be!

The all of Helluva Boss and Hazbin Hotel crew looks confused then the TV turns off and Rambley The Raccoon appears again but on the checkup monitor

Rambley the Raccoon: Let me get a gooooooooooooood look at you

The all of Helluva Boss and Hazbin Hotel crew looks confused, A few seconds later

Rambley the Raccoon: Here's a Critter Cuff for each of you to enter Indigo Park, Have fun

Then Rambley the Raccoon disappears

(Idea from @SacredStorm209)