I like that the OP said whoever goes for Lulu's sigil is completely insane.

Count me amongst the crazies, cause I went for it and achieved success.

There's tips and tricks along the way that make some of the mini-games easier. In this instance, there's a certain spot in the Thunder Plains, I think right after you enter the second screen, where you can dodge 2 or 3 lightning bolts in a row.

It's always the exact same spot on the map, so you can see it coming. Just keep walking to the same spot for about a half hour or so and that sigil is yours. Save frequently.