Bomberman

In-game artwork

Kickle from Irem's Kickle Cubicle (Meikyuu Shima / 迷宮島) makes a cameo in the intro, hovering in the top-left of the crowd.

Japanese - American - European (click to enlarge)

The game features a different title for each region, though the European version has a dipswitch to toggle between Dynablaster and Bomberman logos.

The American version includes a "Winners Don't Use Drugs" message before the title screen appears.

Japanese - American/European

The Japanese version can only support up to 2 players, while the US and European releases have dipswitches that enable up to 4 players.
However, the US and European releases render the Vs. Game inaccessible due to the removal of the mode selection menu, pictured left.

Stage 6-5
Japanese - American/European

The American/European version changes a majority of the stages, ranging from adding a single robo-Bomber enemy (otherwise only seen in the final battle in the Japanese version) to making an entirely new level. Some stages are also rearranged to take place earlier or later in the world - Stage 5-4 is made 5-3 in the American release, for instance.

The Cocktail version of the game has a change present in no other version - if playing alone, the stage will reset if the player dies. In all other versions, the only time the stage will reset is if time runs out.

The red imp that hides behind soft blocks only appears in Worlds 1 and 6, but has additional graphics to fit in with Worlds 2 through 5, as well as a block that doesn't fit with any recognised tileset. Strangely, the disguise for world 4 is of the walls surrounding the stage, not a soft block.