I finally did it! I dodged 200 lightning bolts in a row on the Thunder Plains in Final Fantasy X!
Now I have Lulu's ultimate weapon, the Onion Knight, fully upgraded.
First, I had to capture one of every monster found inside Sin, then I had to fight the monster created from these monsters in the arena and steal 30x Purifying Salts from it. This added the ability "No Encounters" to my armor so I could walk around the Thunder Plains without being assaulted.
For those of you who have played FFX, you know how difficult it is to stay attentive long enough to dodge 10 bolts in a row, much less 200.