Toxic Grind Extra life
At the main menu, hold L + R and press Y, A, X, B, Up, Left, Down, Right, click Left Analog-stick.
Shield
At the main menu, hold L + R and press Left, Right, X, B, Y, A, Up, Down, click Left Analog-stick.
Anti gravity
At the main menu, hold L + R and press Up(2), Left, Right, Up(4), click Left Analog-stick.
Magnet pegs
At the main menu, hold L + R and press Y, Up, Y, Up, Y, Down, Y, Down, click Left Analog-stick.
Super spin
At the main menu, hold L + R and press Left, Up, Right, Down(2), Right, Up, Left, click Left Analog-stick.
The image featured at the top of this post is ©The Legend of Heroes: Trails of Cold Steel III key art / Original