Rex Raptor and Weevil Underwood's Duel was the final Duel of the the Japanese National Duel Monsters Championship in the Yu-Gi-Oh! anime. In is based on a Duel from the manga. The finalists were Weevil Underwood from East Japan and Rex Raptor from West Japan, aged 14 and 15 respectively at the time. One of them defeated Mako Tsunami in the semifinals.