Corrected entry: We are told that in the world of the Charmed Ones, desires aren't real. When they are transported back to the real world, Wyatt is transported too, even though the real Wyatt was never really there to begin with.
rockycm
4th Aug 2010
Correction: I believe that when the demon brings the Charmed ones into their desire worlds, Piper is holding Wyatt and as such brought him into her world by association?