Anime Perfect is a "Faux Style" Version of CvS(Capcom vs snk) it
simplifies the shading and drops the color depth a little; cvs uses roughly
5 for clothes  and 4 for skin and accessories while DBAP uses 4 for clothes and 3 for skin and up to 3 for accessories (except
in special situations)

Spoiler: Samples (click to see content)

for characters who give off a "shine" effect (for my case,Cell,and the buu's) they get 4 shades.I also put a eb
to DBAP sample, krillen.

I would say though the biggest distinction for anime perfect for all styles, is the heads.
This is a essential to the style itself, it can be a pain to get them right,but it makes a huge
difference.  This is universal though, all AP sprites in general should put a lot
of detail into trying to get as accurate as you can to the face.

Spoiler: here's a few examples of different faces from a good portion of people (click to see content)

 

That's about it I think. it's pretty simple to get into with characters with Gi, as imo that's probably the easiest thing to edit for anyone. The most difficulty I have had outside of shirtless people (I probably will never be able to fix up this tien sheet...)  Is unique situations, like cell's armor and wings I eventually figured it out, but it was tricky at first.

As for the other "AP" styles Bleach and naruto are a little different to DB's, As it should be. For the most part the foundation is always the same The color depth can vary between anime's. I'm not going into those though because outside of bleach and naruto the others would need to be "discovered" or created before we can even talk about them.

Here is a few example of AP styled sprites:

Both were made by me.

*ecchi!