Items ON or OFF??
At the main menu enter R, RC, RIGHT, L, LC, LEFT, RC, RIGHT
Play as Drumstick or T.T.
After all you have gotten Amulets, find a frog that is part chicken and run him over. This will give you Drumstick. To get T.T., you must race and beat T.T. in all of the Time Trials.
If you let go of the gas right before you hit a zipper you'll get a green flame.