No, Pits up-b doesn't stop horizontal momentum.
Riot, your Marth may have range, but Dedede's got more =p
Oh, and Jski. If you think Pits too heavy to fly. Then I have to wonder what your opinion on Charizard is =p
My Creations in Modnation Racers! Check zhem!
http://community.modnation.com/en-us/players/IvoYaridovich/creations