My guess for Esclusive raids are: Mewtwo, Mew, Lugia, Ho-Oh, Celebi Which will be counted with the medal with Lugia.
For Regural raids are: Articuno, Zapdos, Moltres, Entei, Raikow, Suicune Which will be counted with the medal with Rhydon.
When the 3rd Generation will be released:
Esclusive raid: Kyogre, Groundon, Rayquaza, Jirachi, Deoxys.
Regular: Latios, Latias, Regice, Regirock, Registell.