If anyone has tips to beat Sephy, or just plainly how you beat him put them here! This is not for posting, just tips and tricks.
Here's the first one:
When you're not doing that triangle thing, run to the opposite side and just sit and wait till he gets close enough to you for you to crap your pants, then double jump and glide to the other side. Then wait for him to do the triangle thing! It's that easy! Except I haven't even beat hi yet...
-Sig credit goes to PhilXZ. The pic of Kairi's head was cropped by Rathalos9. Apparently no one else can crop Kairi's head...