To get Ryu's silver gi, follow these directions.

1. Go to the Secret Factor
2. Go to the Shop
3. Buy Ryu's new color
4. Exit Shop
5. Exit Secret Factor
6. Go to any mode that has a character selection screen
7. Hilight Ryu
8. Press L1
9. Pick Ryus' Assist Type
10. Choose 2nd character
11. Pick 2nd character's Assist Type
12. Choose 3rd character
13. Pick 3rd character's Assist Type

Now Ryu will be wearing a silver gi.
Note: A gi is a karate suit.