Mystery Note

The Mystery Note is a note written in Shy Guy language, found in Shy Guy's Toy Box during the events of Paper Mario. Mario can give the note to Russ T. so he may translate it, but Mario needs to give him the Dictionary first. It is not required to translate the note in order to complete the game. It is basically a clue to the order in which Green Station's four colored boxes must be hit to restore the track leading to Red Station.

Translation
"Hit yellow, green, red, and then blue."

Trivia

 * The Shy Guy holding the Mystery Note when entering the battle has three other Shy Guys (green, red and blue) fighting alongside him. The order they appear in from left to right is the same as the translation.
 * The order to hit the switches is the same as the order in which the Switch Palaces appear in Super Mario World.