Renewall:
>Poring>Spore>Bigfoot>Horn>Orc village>Orc dun>Hodes>Petite>Roween or Stapo>Magmaring or Magdun2

Pre-renewall
>Poring>Muka>Metaling>Les

This is actually really bad, like embarrassing bad. The original game was supposed to be balanced based on difficulty but after the episodes they added so many completely arbitrary numbers the game is utterly broken.