When does AA is needed in animation?

[TheBigBang]

Like I said in the title. When does AA is needed or is it needed at all in pixel animation? Making Anti Aliasing isn't the easiest thing to master. Any tips to make good AA? is there something which should I avoid making AA?

[Gil]

It's all up to you, but like with anything, I advise you to learn it, experiment with it, make it your own and then decide how much, or none at all, you want in your own work. This counts for pretty much all techniques. You need to know something to be able to decide to not use it.

[Atnas]

Commonly you'll find that frames with a lot of movement forgo AA, and the keyframes are AA'd if it's part of the style you're doing the sprites/whatever in.

I'm not so sure it's ideally a linear graph of <movement> and <amount of AA>, you'll have to play on that, but generally if there is more movement you can AA less.