Dream Soccer King

Dream Soccer King is an animated short associated with the One Piece movie Chopper's Kingdom on the Island of Strange Animals. Timeline-wise, the short most likely takes place around the Baroque Works Saga, as Princess Vivi is still with the Straw Hats during this time.

Summary
It is the Grand Line Cup Final, and the special playoff is soon to be decided by a tie-breaker shoot-out, with Coby acting as goalie. Luffy starts the match off by goaling with his Gomu Gomu no Shoot technique. To counter, Buggy uses his Bara Bara technique to break apart and sprint with his reduced weight, only to have the ball miss after a wide curve, putting the Luffy Pirates in the lead. Zoro and Hatchan goal easily, while Tony Tony Chopper pops the ball. Jango, Usopp, and Bon Kurei goal, tying the score. The Villain All-Stars call a back-up player, Odacchi (a cameo appearance by Oda himself), whose ball is caught with ease by Coby, giving Luffy's team the advantage.

The outcome of the game now depends on Sanji and his incredible kicking prowess. However, that prowess sends the ball hurtling into the sky. Just as Buggy victoriously calls a sudden death, an unidentified flying object is reported to be flying over the Grand Line and towards the stadium. The object turns out to be the soccer ball, and the ball lands into the goalie net with a bang, winning the Straw Hats the game, and earning them the title of Pirate Soccer Kings.

We set our sights back at the Going Merry, where Luffy is found asleep. As he awakes, he discovers what looks like a brightly-colored soccer ball. As he charges at the ball with his Gomu Gomu no Shoot technique, it is revealed to the audience that the "ball" is actually Usopp's bottom. The rest is history.

Cast

 * Mayumi Tanaka as Luffy
 * Kazuya Nakai as Zoro
 * Akemi Okamura as Nami
 * Kappei Yamaguchi as Usopp
 * Hiroaki Hirata as Sanji
 * Ikue Ohtani as Chopper
 * Misa Watanabe as Vivi
 * Shigeru Chiba as Buggy
 * Toshiyuki Morikawa as Hatchan
 * Kazuki Yao as Django and Bon Clay
 * Mika Doi as Coby
 * Kouichi Nagano as Helmeppo
 * Eiichiro Oda as Oda-Chii