Riley’s favorite movie in the Roblox-related reference appears to be Witch of ZO. The same source also lists Looking for Beebo and John’s Candy Factory as favorites.

Quick Scoop

That means if you’re asking “what is Riley in Roblox fav movie,” the best match from the available public reference is Witch of ZO.

Extra note

This is based on a fandom page tied to Riley Park and the tape in question, not an official Roblox profile.