One Piece: A Smash Adventure is a crossover between One Piece and Super Smash Bros. written by Specter24. The story can be read here
One Piece: A Smash Adventure contains examples of:
- Back from the Dead: With the exception of Bowser and Giovanni, every single main villain (not exactly ALL of them) of a certain series was revived by Obscurum.
- Multi-Mook Melee: The Strawshats VS the Fighting Alloy Team in the Smash Bros. arc.
- Original Character: The Emperor Gods as mentioned in the Smash Bros. arc and the Aterneco in the final arc
- Free Sample Plot Coupon: Merlon had the first mystery heart and gave it to the Strawhats similar to how the Merlon in Super Paper Mario had the first Pure Heart.