Catching Zapdos with one ultra ball in Red and Platinum
Also took six for Articuno and two for Moltres in Red.
Three for Groudon and one for friggin KYOGRE of all things. As well as YMMV lost footage one-ball capture of Raikou in Soulsilver. He pretty much just has a knack for these, and he always says "my luck is up it ain't happening again" but it does. He fears that some might think he edits the footage even!