Shadow or Daisy? Neither, both should be a costume at best. In brawl their is already a costume that makes your peach look just like daisy, pick that reskin and pretend she is daisy lol.
As for Shadow, Sonic in brawl was nice but adding other sonic characters would be overdoing it, they are not Nintendo characters and Sonic was acceptable cause he made a impact in the history of video games, shadow did not.
What?! I can't hear you over all this awsome! - Pyrrhon (Kid Icarus:Uprising)
Final Ultimate Legendary Earth Power Super Max Justice Future Miracle Dream Beautiful Galaxy Big Bang Little Bang Sunrise Starlight Infinite Fabulous Totally Final Wonderful Arrow...FIRE! - Wonder-Red (The Wonderful101)