Bububu-bu Bu-bubu

Bu-bubu is surprisingly an exact copy of the Bo-bobo and Dengakuman fusion, Denbo-chan. She is the older sister of Bo-bobo and she uses "Wakige Shinken" (ワキ毛真拳; "Fist of the Armpit Hair"), a technique which allows her to stretch out her armpit hairs and strike her opponents with them. (Source: Bobobo Wiki)