Yeah, I remember when I had Lulu so beefed up Blizzaga Fury did continuous 9999s against Seymour. It's like the attacks in Blitz Ace; you'll notice they're not nearly as powerful as Tidus's normal physical attack, but more plentiful.
Ok I stand corrected, although you must've had to kill Jumbo Flan a thousand times to get enough magic spheres to get it to do that much damage.