Indie-Pendence Trio is Undertale Trio Au that crossover between three Indie Games, Undertale, Bendy (BATIM/BATDR), and Spooky's Jump Scare Mansion.
The project has some addition to the character's abilities, storylines, and appearances that do not exist in the original game (Fanon) to make the story intensify and can be expanded.

Undertale by Toby Fox
Bendy Series by Joey Drew Studios
Spooky's Jump Scare Mansion by Lag Studios

Indie-Pendence Duo and Indie-Pendence Trio by EmptyAzurite

Cameo
White Face and HER (IMSCARED by MyMadnessWorks)

Easter Egg
Mountain (Celeste by Matt Make Games)
Freddy Head (Five Nights at Freddy's by Scott Cawthon)
Cup (Cuphead by Studio MDHR)
Tattletail (Tattletail by Waygetter Electronics)
Hollow Knight Head (Hollow Knight by Team Cherry)
Plus Symbol (Baldi's Basics by Basically Games)
Lightbulb (Omori by Omocat)