Falco's recovery?
Hehehe.
There are a few things you can do. Time PKT so that the tail interrupts Falco Phantasm. A wise Falco once said that in most cases, a Falco doesn't want to have to use Up B to recover. It's easily blocked with Ness' offstage game; fair, or the head of PKT to knock him away to edgehog.
Ness' Back air has higher priority than the Phantasm (unlike Ness' dair
). Short hop it and bair that fool in the face if you can predict when they'll use side B, which shouldn't be too hard... They won't go too far above the ground using it, because that there's a free grab. Man, if only I had the replay for that one...
PK Furashu. Start it up when they're offstage, predict the side B and punish. You should release right about the time when they initiate side B, depending on the distance... Problem with this method is that if they see you doing this, they can choose to up B from below instead and avoid Flash altogether. It's best to use this one sparingly, it's risky...