TL;DR: Nintendo decided to do a cool thing for their game's competitive community and give the tournament winners a custom cosmetic. The winning team is these guys called "jackpot". Some time later, a large quantity of discord messages are leaked that consist of the whole team saying a whole bunch of racist shit about black people. Now, Nintendo is removing the custom banner and disqualifying Jackpot. It's currently unknown whether the runner-up team, Phantom Thief, will be given the trophies or a banner.