i was wondering... I've never seen a gba iso game with AA, but i hav seen a few pc games and pixel arts with AA. well, what im wondering is, is it right to put AA on a iso pixel art or sprite?

Some isometric artists wouldn't think of adding aa (such as jalonso). I, personally, add a bit of aa but try not to do as much as I would on a differently styled piece. It's really a matter of preference.

I can't see why an isometric piece would be exempt from the celebrated riddance of aliasing any more than the next piece. If it were, then this, in my view would be like saying "a 3-point perspective piece must never have dithering" or some other arbitrary nonsense. The decision is up to the artist. I intentionally leave certain pixels bereft of any anti-aliasing to achieve certain results. This aspect is about objective discretion of the artist and not set rules.

As such, I disagree with jalonso's refutation of anti-aliasing as a sign of bad line-art. When I anti-alias sounds in the music I make, it's certainly not a sign of bad composing! jalonso is clearly an AA-Luddite!  J/K

It's trouble. Non-AAed iso is MUCH easier to get to tile correctly than AAed iso (let's play a game called 'avoid-the-edges' -- in 3 dimensions!). It's doable though, and I prefer it.

if you check out my gallery, you'll notice that my isos are AAed. its just a matter of opinion.