Tetris DX

Tetris DX reiterates the most addicting game by adding a save feature, new music, and some additional game modes.

Unused Music
Five unused songs can be accessed via Game Genie code, replacing the first main menu screen's music.

"The March of the Toreadors" from the original Game Boy game! Tetris DX may have had a D-TYPE music setting planned at some point during development, possibly replacing the OFF setting. It could have been scrapped for time, or simply because Tetris originally had three songs. Remains a mystery either way. Game Genie code will replace the in-game A-TYPE music.

Unused critical music. Game Genie codes will replace the in-game A-TYPE music.

The full Korobeiniki theme. Unlike the four-second jingle heard during the rocket cutscene featuring a dancing Statue of Liberty, this version is never heard. Game Genie codes will replace the in-game A-TYPE music.

Possibly intended for a credits theme. Game Genie codes will replace the in-game A-TYPE music.

Quick looping song. Likely used for testing purposes. Game Genie codes will replace the in-game A-TYPE music.

Unused Jingles












Unfinished Super Game Boy Commands
A few Super Game Boy commands were removed for both Super Game Boy settings and one was probably intended for a palette setting and the rest might have been for sounds or additional palettes. There is also no code to call the commands so setting your own palette in the empty slots will not work.

Located at is the abandoned Super Game Boy commands. Unfinished commands for the Super Game Boy 2 settings are found at.

Super Game Boy 1 and 2


When Tetris DX is played through Super Game Boy 2, a different border is displayed than when it is played through the original Super Game Boy. However, the "2" border can be accessed in the original by putting Tetris DX into a Game Genie into the Super Game Boy, as the Super Game Boy 2 verifies whether the internal accumulator value is during boot up determine whether it is Super Game Boy 2. The Game Genie boot ROM bypasses the internal accumulator telling the game to load Super Game Boy 2 features.

Border Lines


Code exists that allows setting any bits where additional unfinished Super Game Boy packets would have been to display bitmap 4x4 lines in the game window using system palette 1. May have been used for testing the borders or were preliminary plans to overlay the game area with images, which would have caused good grief for many Tetris players. Super Game Boy border line bitmap range. Super Game Boy 2 border line bitmap range.

Unused Graphics
There a few unused graphics and a ton of placeholders loaded at the title, so there may have been further plans for the title screen.



A title screen placeholder icon not loaded anywhere else in the game.



The early idea to display Tetris DX in Japanese is the only remnant left. This appears to have been placed over the placeholder tiles because there are still remaining pieces.



This copyright string was likely going to be placed at the bottom of the ENTRY.

MUSIC Letters
There is code that constantly swaps the letters MUSIC when selecting a mode. These letters were likely supposed have shadowing effects as with the BGM TYPE letters.

Connection with Game Boy Color Promotional Demo
Not only was the promotional cartridge an excessive hack of Wario Land II, but it also features code from Tetris DX, most notably the fish pond, "flying triangles" Nintendo logos, and chalkboard. GameShark code will show these attraction demos when playing Tetris DX on a Game Boy or Super Game Boy:


 * - Fish Pond
 * - "Flying Triangles" Nintendo Logo #1
 * - Chalkboard
 * - "Flying Triangles" Nintendo Logo #2

Changes
The words "Now in" were removed from the blackboard.