This game has hidden development-related text.
Absolute Brickbuster is an Arkanoid/Block Kuzushi clone with lots of Engrish. Not much else to say here...
Top Screen Background Section
There is a covered up background that is somewhat visible on the top screen. While not necessarily unused, you never get to see this background in good detail, and some parts are covered by the "level scheme" slapped on top of it.
Unused Multiplayer Mode
There are some assets for a multiplayer mode that go completely unused. It could have had up to 5 players connected at once, though!
Present in the archive and character directory, dummy.txt is exactly what it says it is.
Cleanup > Pages missing date references
Cleanup > Pages missing developer references
Cleanup > Pages missing publisher references
Games > Games by content > Games with hidden development-related text
Games > Games by content > Games with unused game types
Games > Games by content > Games with unused graphics
Games > Games by developer > Games developed by Tasuke
Games > Games by platform > Nintendo DS games > DSiWare games
Games > Games by publisher > Games published by Tasuke
Games > Games by release date > Games released in 2010