Final Fantasy 7 - Getting Yuffie

Out of the two secret characters that could join your party in Final Fantasy VII, Yuffie Kisaragi will be the toughest to acquire. However, getting her will prove almost vital to your adventures since if you want to, say, breed chocobo, you'd steal more efficiently from certain enemies, and Yuffie is just the character to do that.

Firstly, you'll need to actually find Yuffie. You can find Yuffie at any time during your adventure after you leave Midgar and are able to walk and/or drive around (with your Buggie) a forest area. Any forest area will work. Don't be fooled, though. You will encounter Yuffie just like you will encounter any other enemy -- randomly. If you use the Sense materia when you encounter Yuffie, her name will be 'Mystery Ninja'.

After you engage battle with her, you'll just have to take her down like any other enemy you have faced. You can do anything you want to take her down. It may take a while depending on your level, but she probably won't be strong enough to take down your entire party during the battle. Do what you are most comfortable, and the hard part of acquiring Yuffie will be over.

Once the battle is over, your party and Yuffie will appear on a small map with a save point. Yuffie will be lying down, tired from battle. DO NOT USE THE SAVE POINT. Yuffie is a materia thief. You must NOT take your eyes off her. Do not access your menu or anything. If you do use the Save point or go to a menu, she will be gone and she will have taken some of your Gil.

With all this in mind, approach Yuffie while she is laying down and start to talk with her. Now, during this little dialog, you'll have a choice of what you want to say. You must say the correct things in order for her to get the idea that you want her in your party. Follow the proceeding instructions carefully!

Yuffie: "You spikey-headed jerk One more time, let's go one more time!"
CORRECT ANSWER: Not interested.

Yuffie: "You're pretty scared of me, huh?"
CORRECT ANSWER: ......petrified.

After this, she'll start to leave, but will turn back around and say:

Yuffie: "I'm really gonna leave! REALLY!"
CORRECT ANSWER: Wait a second!

Yuffie: "You want me to go with you?"
CORRECT Answer: ......That's right.

Yuffie: "All right! I'll go with you!"
CORRECT Answer: ......Let's hurry on.

Now, Yuffie will have joined your party. Train her as you will and have fun!