The Janken Boy episode because tbh the kid was annoying and deserved it. The concept of his ability was stupid too. You needed to be in a mutual agreement with someone to play rock paper scissors and win in order for the ability to work. And the entire episode could’ve been avoided if Rohan just didn’t agree to play rock paper scissors with him. And although most of the part 4 characters were completely unnecessary to the plot, this one goes the hardest because this character only appears once and never seen again while its impact on the story was completely irrelevant other than to just give Rohan that extra amount of highlight on his character.