Talk:Route 12/@comment-2202259-20131213211507

Lapras is actually far rarer than Mew or Mewtwo, the reasoning is that only 2 Pokemon are catchable per wave here, as opposed to all the hundreds which spawn each visit to Unknown Dungeon. The Formula for rarity of each Pokemon is (Level Percentage x Number of Catchable Spawns/Total Pokemon in Level) For Pokemon that appear on multiple levels you would calculate that for each level & take the avarage.