Cross Epoch is a one-shot Japanese manga collaboration by Akira Toriyama and Eiichiro Oda. It’s a crossover between their respective masterpieces, Dragon Ball and One Piece.
The story does not involve epic battles but consists of short scenes in which the characters, usually one of each series in pairs, interact together. Even if the characters here have roles different from usual they remain anyway faithful to themselves.
In this manga Krillin and Chopper are conductors of a roller coaster
Bulma and Nami are thieves
Master Roshi and Sanji are police officers
Vegeta(here with Nico Robin, Trunks and Usopp) has horns and is the captain of a pirate crew
Piccolo is a swordsman as Zoro
At last, here is Buggy with Emperor Pilaf