I was wondering that myself earlier. Thinking Squirtle sounded the most like my playstyle, kept wondering if it were possible to switch midair to recover easier (maybe Ivysaur vertically and Charizard horizontally).
Here's something I don't recall seeing answered either: Is there a set pattern to switching? Ie: Charizard switches to Squirtle switches to Ivysaur switches to Charizard? And is it possible, mid switch, to use it again and bypass the one inbetween? Like, using DownB twice to go from Charizard to Ivysaur (as per previous example)?