1. desynch so that you can edgehog with POPO, not nana. an easy way is to dodge, and have nana do a move first (ice block, blizzard, smash, whatever.) while nana is doing it, wd onto the edge with popo.
2. wait for the opponent to try to recover, then press up with popo to get back on the stage normally
3. have nana do a dsmash while popo is getting up
you can't have nana dsmash WHILE popo is on the edge, but the edgehog is still in effect for a little bit while popo is getting up. so yeah, great edgeguarding tool.
i'm still not sure about charging nana's smash while popo is hogging... which is why i didn't post in that other thread. *shrug*