To Unlock the Martians during a game you need to successfully ( make the fielder drop the ball) perform a takeout slide at 2nd base and third base in a row. After doing so the screen should say Martians Unlocked. Now the martians can be played as in any game.
Minotaur
Hit a homerun in Forbidden City.
Pinto
Hit a homerun at Busch Field.
Pony
To Unlock the Pony team you must successfully (knock the ball out of the catchers hand) perform a take down slide at home plate.
Rocket Park
Hit a homerun in Minute Made Park.
Rodeo Clowns
To unlock the rodeo clowns as a team you need to get a double play. After getting a double play you should see a screen that says " Rodeo Clowns Unlocked".
