Gynu!!

The Gynu force if Frieza's special army.  Each member is extremely powerful (at least for this point in the story-the Frieza saga).  The members are Jeice, Captain Gynu, Burther, Gaouldo and Raccom.  Their leader is Captain Gynu.  He can switch bodies with any other person or animal.  Gauldo has the power of ESP. (he can read minds), and an attack called 'time freeze'.  Guess what that does.  They are defeated by Goku (with the acceptation of captain Gynu who gets stuck in the body of a frog).  They are invited by King Kai (in secret) to his planet and battle Yamcha, Tien and Chou-su (as they later find out is as part of their training).  They beat the Gynu and send them to Hfil.