Fictional characters can't have real disorders. They can be made to portray real disorders; but they're faking it (just like Aspie poseurs). So no, SpongeBob SquarePants does not have AS or HFA.
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The mere fact that science may not yet adequately explain an object, event, or experience does not mean the immediate explanation should automatically default to a conspiratorial, extraterrestrial, paranormal, or supernatural cause.