Okay, unlocked some #ndsdev achievement: got extended palettes working on 16K video memory rather than 64K.
Granted, that kills the colors of the background, but I should have ways to fix that. Last week, I'd get either only the background or everything black ^^"
Oh, that could be #ScreenshotSaturday, somehow :P
*edit* : all it's missing to work is a BG1_CNT |= BG_PALETTE_SLOT3 in layers configuration, hopefully ^_^










