Because it does

Mostly did this as an exercise in picking out GBA-compliant palettes (which I may or may not have pulled off, since there may be other limitations I'm unaware of), but any excuse to make Eggbug fanart is a good one! Apparently the GBA (and SNES) actually uses 15-bit color, which someone helpfully converted to 16-bit RGB levels so you can do it in art programs that don't support weird color ranges. I actually had a few other colors picked out that I didn't use, and even then I came in under the "16* colors per sprite" limit, so if I wanted I could probably actually do a few more intermediate colors and smooth the shading out a bit more.

*15 if there's transparency, since that takes up a color; either way this is only 8 + alpha, so 7 more colors is plenty of wiggle room

I'm actually contemplating opening up pixel art commissions (mostly focused on emote-sized stuff, which could also extend to icons and such), but I'm not sure how much to charge, what the best way tp take payments would be, or if there'd even be much interest in that (or how I'd feel about sitting down and doing art of things I don't necessarily care about, which is also a hangup I have re: illustration commissions)