Kamen Rider Double Fang Joker is the combined form of Shotaro Hidari and Philip in Kamen Rider W, created when the two partners transform together using the Fang Memory and Joker Memory. It is an especially aggressive and powerful battle form, known for its wild, close-quarters combat style and sharp fang-themed attacks. As a fusion of the series’ two main heroes, it represents their perfect teamwork and is used in critical fights against powerful Dopants and major threats.