User blog comment:Wondergirl130191/The Fates of.../@comment-50.135.150.146-20121116030348/@comment-432124-20121117044753

If you mean the changes that he makes to the future, that's not how time travel works on this show. Bart is unaffected by any changes made to the future while he's in the past. He practically exists outside of time. Otherwise, he would have disappeared in the blink of an eye sometime before the events of "Before the Dawn".