Route 15 has 11 wild species on its encounter table, appearing between level 20 and 28. 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 Jespurr, Juskitten, Moisen, Scorlo, Winzzle, Brixlet, Spooklet, Patches, Kitsu, Dustle, Knyfagon. The most common encounter is Jespurr at 17.4%; the rarest is Knyfagon at 4.3% — worth knowing before you settle in to hunt one specific spawn.
Light
Poison
Flying
Fairy
Electric
Ghost
Dark
Fire