ProfOakChallenge

Cresselia in fullmoon island Giratina dialga and palkia as well

I recently started playing again doing a challenge and noticed some pokemon can be caught early on through swarms. But then I noticed swarms are kinda not documented on forum. Few minutes ago there was a Phanpy swarm in Kanto Victory Road, but ingame pokedex doesnt say anything about it. So my question is, is there a list of every swarm pokemon available and how often do they occur.