https://www.polygon.com/nintendo/2018/12/15/18142347/charles-martinet-voice-of-mario-guinness-book-of-world-records-super-smash-bros-ultimate

Charles Martinet, the voice of Mario for almost 25 years now, got more than just a certificate from Guinness World Records — they made up a category just so they could honor him. His voice in Super Smash Bros. Ultimate is officially the 100th time he’s performed in a video game as Nintendo’s frontman and, yes, that is indeed a record.

Nolan North, by comparison, would have to star in 95 more Uncharteds as Nathan Drake, or 95 other Assassin’s Creeds as Desmond Miles to break Martinet’s hold on this mark (he’s been in six games as each). We don’t think that’s happening anytime soon. So, I stipulate to both Martinet as record holder (officially, it’s “Most video game voiceover performances as the same character”) and to the unassailability of said record.