No, Ryou, the spirit in your Ring knows the answer XD; Pegasus did know that all the Items possessed an evil intelligence, but he only told Yugi that and not Ryou.
I’m kinda sad the Ryou-investigates-the-Items idea went nowhere. it could’ve been interesting to see, especially in interactions with Yugi, Pegasus, Marik and Ishizu. (Or Shadi if they ever met before the Memory World. Hmm…)
Oh snap, I just found a scripted duel that slipped under my radar–Joey versus Pegasus on June 19, 2016! Joey ran out of time building a deck and couldn’t enter the WCQ, so he needs someone to test it on!