This game has hidden developer credits.
The popular multiplayer mode makes it to the NES. And the people rejoiced.
To check whether the game was hard or soft reset, the game uses the string
A string with the game's name appears at the end of each version's ROM. The North American and European versions also have build dates.
BOMBER MAN 2
These passwords toggle various features in the game.
Entering this password leads to the first area's bonus stage. After that, the player is thrown back to the title screen.
|PBOMBACE||K2JG2135||Shorter Bomb Timer|
Bombs sit shorter before detonating (1 second).
|PBOMBOLD||K2JG2JF4||Longer Bomb Timer|
Bombs sit longer before detonating (3 second).
|PBOMBMAN||K2JG2G1H||Reset Bomb Timer|
Resets the bomb timer to its default 2 second delay.
Remote bombs are always enabled in 1P mode.
Enabled remote bombs, but bombs will detonate by themselves if left around for too long.
It's a sound test. Duh.
The trademark info was updated in the North American game, and a trademark symbol was added. The European version is titled Dynablaster, the name used for all European Bomberman releases up until Super Bomberman, as the original title was associated with terrorist bombings (at the time).
The cross on the church was removed.
As evidenced above, the password format is different between the Japanese and international revisions. The international releases omits all vowels, an odd bit of censorship(?) that can be seen in other games. Though the symbols changed, the actual password values are identical. A=1, H=8, I=B, etc.
Spaces were removed between Bomber and Man, and Man and 2. The European game remembers to update the game title.
Corrupted DPCM Samples
The explosion sound effect suffers from bit reversal, a sample encoding issue which plagued many NES games including Bomberman (NES), Double Dribble, Mr. Gimmick, and Klax.
An explanation for this is given on Ufouria's page.
Original Explosion Sample
Fixed Explosion Sample
The percussion and orchestra hit samples also suffer from this issue.
Original Percussion Samples
Fixed Percussion Samples