Mt. Poizeburg or Cita Lyell in winter.
Here is a collection of the Batamon of the greatest Batarulers in the Cassire Region. Batarulers are those who own and battle with Batamon. Super Batarulers are the best, and to become a Cassire Super Bataruler yourself, you must defeat the Super Batarulers League, which gradually gets harder, until you have to defeat Alec, who has 20-23 EL / 25 EL Batamon. EL= Experience Level (grows when a Batamon battles and wins). Also, an item – Knowledge Cookie – can raise the EL of a Batamon by 1 (A little bit like Rare Candy)!