There is a person going around with a hacked version of a shirt. Basically, that Annaki Red Cuff shirt has been forced to have Ability Doubler on it, which is an ability exclusive to the Splatfest Tee Replica. Basically, don't even think about buying from any player wearing the Annaki Red Cuff with the Ability Doubler because sooner or later, Nintendo's gonna notice it and start banning people who have it and uses it in battle.