FIFA Street Cheat mode
At the main menu, hold L + R + White + Black + Y + X + B to unlock all bonuses.
Maximum speed, power, tackling, tricks, etc.
At the main menu, hold L + Y and press Left(3), Up, Down(2).
All apparel
At the main menu, hold L + Y and press Up(2), Left, Up(3), Down, Left.
All apparel and footwear
At the main menu, hold L + Y and press Right(2), Left, Up(3), Down, Left.
Mini-players
Pause the game, then hold L + Y and press Up, Left, Down(2), Right, Down, Up, Left.
Normal size players
Pause the game, then hold L + Y and press Right(2), Up, Down(2), Left, Right, Left.
Easy goals
When you are at the bottom left or right of the pitch, cross to a nearby player and head it. You will score about 95% of the time and about 60% of the time you will do a classy goal.
The image featured at the top of this post is ©The Legend of Heroes: Trails of Cold Steel III key art.