Yeah, the Japanese have a thing for girly-looking boys...

http://www.geocities.jp/oyoyokakumei/toppage.html has some cute arts for Foster's and other series (Teen Titans, Batman, X-men Evolution)
http://gekiamana.lovesick.jp/newpage30.html also has some cute stuff also (Along with a 1 page comic that seems like Coco is chewing out Bloo or something. I can't read Japanese so I really can't say)

Can I use a resized version of one of these as my avatar?
The drawings rock. Also a lot of Japanese seem to draw N°. 3 from KND...:P

I would e-mail the artist and ask. If they can not read English then I would suggest that you don't use one of their artworks.

You don't really have to do that. As long as you give some kind of credit somewhere.

lol at the mildly hinted at Wilt and Coco pairing. So freaking cute it gave me cavaties.

I've seen some artists who get really mad and take down everything because no one asked to use an image one too many times.

And on the first link I provided the artist even says that 'reusing fanarts in other websites w/o permission is strickly PROHIBITIED'

Here is a link that many of the Japanese fanartists have on their sites: http://www3.to/ofp/

I made my own avatar anyway now in ms paint :P . Thx.

And it is really cute! (makes me think of Earthbound)

Thanks :P It wasn't meant too, actually...
Bloo was done kinda quick and is thus somewhat misshaped :(
Also grats for "Settling in" now, Matchsticks. :)

Thank you so much for the links; I'm a sucker for them too :D Got any more? I'm afraid I don't have much to add on, as those I know of have already been listed.