That it does! My only complaint left with any of this is a very, very minor one: the menu wallpapers still have inconsistent brightness between the main menu, the battle screen and the dialogue boxes. But seeing as though there's a workaround for this*, it's something that doesn't even need to be addressed.
The discrepancies essentially stem from the diverse gradient effects, a problem that is not limited to the wallpapers. I briefly attempted to address this issue before releasing the patch, but failed to locate the relevant code and data in the handheld editions. Considering that a corrective measure would be released in the form of a supplementary patch, as certain liberties ought to be taken in the process, I didn't feel the urgency.
What gave you that idea? The game's palette was intentionally altered from the SNES original to accommodate the GBA's darker screen, an accommodation that is wholly unnecessary if you are using a DS Lite or a GBA SP 2.0.
Not to mention the Game Boy Player, which allows the game to be played through the GameCube. In any event, considering that at least half of the colors remained unchanged, it is safe to assume that emulation accuracy is completely irrelevant to the subject at hand. Furthermore, the manner in which the colors have been altered varies from element to element, and the level of brightness is certainly not responsible for the various instances of discoloration, such as that of the overworld version of Figaro Castle.