Mystery Trolley (ふしぎなトロッコ) is the 13th and last stage in the Battle Game of Super Bomberman 5. It is located in Zone 5, and is one of the 3 secret stages that are unlocked by pressing the "X" button repeatedly for several seconds at the title screen. This stage features a Trolley that moves in and out of various Warp Holes, eliminating everything in its path.
Battle Group 1
Battle Group 2
Battle Group 3
Battle Group 4
In the "Gold Cartridge" version of Super Bomberman 5, this stage is already unlocked.
Super Bomberman 5 Hudson Soft Guidebook, pages 75, 102, and 103