You refight all the bosses with higher strength. So no surprise there. The keyblade looks really cool though.
KH13.com - Kingdom Hearts - All Keyblades in 3D with photos... (possibly a spoiler?) - Kingdom Hearts 3D [Dream Drop Distance] - KH13.com Forum
Why is it that i see most people using the Last Knuckle keychain? Wouldn't Fantasy Notes be better? (in terms of storyline keyblades)
It has the same Attack, but 4 more Magic, and more chance of a critical hit than Last Knuckle. Of course, in some live streams this is justified since they don't speak japanese or something, but even then, the stats are better. Now i'm confused.