Lilo from 'Lilo and Stitch' most definitely has AS. She doesn't have good social skills, she is completely obsessed with Elvis, and she's not very good at calming herself down in a bad situation (ie. beating up Mertle for calling her "crazy"). And she definitely thinks outside the box.
Gabriella from 'High School Musical' probaby has AS, too. She is pretty anti-social and would rather keep to herself. For instance, she was reading that book at the New Year's Party. She is very shy and is nervous when it comes to trying new things.
Rocko from 'Rocko's Modern Life' is very likely to have AS. He is pretty timid, he loves the 'Really, Really Big Man' comics, he is nervous meeting new people, and he seems smarter than all the people he interacts with, too. Fillbert the turtle may has AS as well, but that's something I'm still debating. He definitely has OCD though.
Nawt, the little red alien in 'Space Jam' probably has AS, too. He's pretty quiet but lets himself be heard when he needs to be. He is, by far, the smartest out of everyone he is forced to be with and is the one coming up with all the ideas, such as stealing the talent from the NBA players. He also has a bit of a tendacy to jump up and down when he's excited about something. Trust me, I've payed waaaaay too much attention to all of this! lol
Fufu from 'Sagwa, the Chinese Siamese Cat' probably has AS as well. He isn't exactly popular amongst his bat peers (actually they're always picking on him) and he's very clutzy. He seems to be pretty bright, too, but no one really takes him seriously.
Okay, that's all I can come up with for now!