>>50887718Displays on both the GBA and DS were wildly washed out before they used the panels in the 3DS models. This was only partially addressed in the GBA SP 101 model and DS Lite through XL. The 3DS family all had a much wider color gamut.
They hyper saturated a lot of sprites for those older sprite games. That's why when directly ripped from the game files or emulated they seem so vibrant, but played on original hardware they WILL look much closer to the 3D model colors.
That all said, the desaturation GameFreak did to a number of 3D models was far too much. You can even see in several mega evolutions the new color schemes that are a lot more saturated than their base forms like Sceptile.
It's a compounded issue.