Yugo Caves has 7 wild species on its encounter table, appearing between level 15 and 19. Rates below are the chance of each species when an encounter triggers, not the chance of an encounter itself.
The wild Dokimon you can find here are Quackfear, Bundust, Deathscye, Yomeshi, Okami, Sylfi, Jespurr. The most common encounter is Quackfear at 20%; the rarest is Okami at 10% — worth knowing before you settle in to hunt one specific spawn.
Dark
Flying
Light
Fairy
Grass
Ghost