Despite being introduced in the second arc, Tron and his group have been much more active with their goals and Tron actually has a present in the series. He's a creepy little kid and I'm still curious as to what plans he has for Shark, especially when he still has that Number card, but I'm honestly wondering why he isn't the major villain for the series. He definitely fits that description more than Dr. Faker does. Though, he's probably only going to be the final villain for the WDC arc, but he seems to be more thought-out than Dr. Faker is. I don't think that the writers knew what to do with him, so they decided to create new villains and figure that out later. Even with the new opening showing that he's going to be buffed up, I still can't understand why they're trying to make it look like Dr. Faker is the matermind behind the series when he hasn't done much of anything.
Tron doesn't bother me that much though. He's creepy, but not too annoying. The only brats in this show that I can't stand are Yuma and after his attempt to sneak into the finals again, despite being threatened for the first offense, Flip. Yuma is still a poorly written, incredibly annoying and unlikable main lead and Flip, who I don't want to look up his original name at the moment, has no redeeming qualities to balance out his attempts to cheat and I seriously question why he's included in the supporting cast if he's going to treat his so-called friends as distractions like that. Though, everyone following his suggestion to crawl under the carpet when there were a ton of people around them, many with cameras, kind of shows that everyone in this cast is pretty dumb too.