Potcha

Potcha and his partner Mondai were two imposters who tried infiltrating Konohagakure. Potcha and Mondai sought fame in their village and apparently spent months perfecting their "disguise" technique. Potcha appears to be goofy and not very smart, very much like his partner Mondai. Potcha along with Mondai put on football helmets and charge at the enemy with a high-speed attack though it is unknown what the effects of this technique are since it was halted. (Source: Narutopedia)