The Blue Alien is one of the characters in Putt-Putt Goes to the Moon.
The Blue Alien will act as the referee of the Alien Tag mini-game. He appears when Putt-Putt clicks on the crater to his right. After Putt-Putt accepts to play the mini-game, he will go back into his crater to start the game. Sometimes he will appear as one of those who are to be tagged. When the game is over, the Blue Alien will give Putt-Putt Glowing Moon Crystals equal to the number on the large rock behind Putt-Putt. He appears to have the same voice as Luther from Freddie Fish.