devkitPro

ok maybe a silly question, but i want to know if it's possible, say I have extended palettes enabled can also use the palettes in the "standard" palette memory( i mean the piece of memory where you can write 16 16color palettes and 1 256 color)

Yes, here's the information on that on gbatek: http://nocash.emubase.de/gbatek.htm#dsv ... edpalettes

For backgrounds, the regular palette slot ends up serving as palette for a couple of different things (like 8bit bitmap backgrounds) while it appears that for sprites, it's just an extra 16, 16 color palettes.

think i get it, so i can have 16 16 color palettes and 256 color palettes. I only have to set in the Oam which colorformat it is, and if it is 16color it will pick the palette out of the standard memory

Yes, both 16 color backgrounds and 16 color sprites read from the standard 256 color palette memory even when extended palettes are enabled.