YUFFIE'S ULTIMATE WEAPON
The Conformer, Yuffie's ultimate weapon, can be found in the same ship as Cid's Highwind Limit Break. This ship, the Crashed Gelnika, can only be reached using a sub. It is in the ocean, off the coast of the Gold Saucer. Drive into the crashed ship graphic to enter a hallway. Run through the door just to the right of the Save Point. The Conformer is in a treasure chest there.

YUFFIE'S LEVEL 4 LIMIT BREAK

Yuffie's Level 4 Limit Break is called All Creation. She recieves it after defeating Godo at the top of the Pagoda of the Five Mighty Gods. This Pagoda is in Wutai, by Godo's house. Enter the Pagoda with Yuffie in your party and talk to the man who's sittting down. Say that you would like to climb the Pagoda. You will now have to defeat five bosses, Gorki, Shake, Chekhov, Staniv, and the hardest, Godo. If you can pull this off, you'll get All Creation. If you need some tips on how to beat these bosses, look no further than my boss guide.