The new Pokemon added were Mankey, Primape, Annilape, all Meowth variants, both Persian variants, Perrserker, Farfetch’d, Sirfetch’d, Cubone, Marowak, Porygon, Porygon2, Porygon-Z, Capsakid, Scovillan, Tinkatink, Tinkatuff, Tinkaton, Cyclizar, Glimment, Gilmmora, all Rotom forms, Greavard, Houndstone, Sandygast, Palossand, Kecleon, Flamigo, Cryogonal, Dondozo, Tatsugiri all variants , Frigibax, Arctibax, Baxcalibur, Gimmighoul, Gholdengo, both Qwilfish variants, Overqwil, Treecko, Grovyle, Sceptile, Torchic, Combusken, Blaziken, Mudkip, Marshtomp, Swampert, Feebas, Milotic, Chinglimg, Chimecho, Indeedee, Purrloin, Lieperd,
Munna , Marsharna, Throh, Sawk, Yamask, Cofagrigus, Runerigus, Wimpod, Golisopod, Nicket, Thieval, Clobbopus, Grapploct, Mimikyu, Kleavor, Morpeko, Golett, Golurk, Rookidee, Corvisquire, Corviknight, Igglybuff, Jigglypuff, Wigglytuff, Fidough, Dachsbun, Starly, Staravia, Staraptor, Spoink, Grumpig, Squawkabilly, Crabrawler, Crabominable, Nacil, Naclstack, Garganacl, Gulpin, Swalot, Zubat, Golbat, Crobat, Charcadet, Armarouge, Ceruledge, Maschiff, Mabosstiff, Toxel, Toxtricity, Shroodle, Grafaiai, Zangoose, Seviper, Mime Jr., both Mr. Mime variants, Mr. Rime, Foongus, Amoongus, Heatran, Volcanion, Cobalion, Terrakion, Virizion, Keldeo, Meloetta, Genesect, Hoopa, Marshadow, Meltan, Melmetal, Drakrai, Latias, Latios, Kyogre, Groundon, Rayquaza, Magearna, Zeraora
Megas: Mega Absol Z, Mega Garchomp Z, Mega Staraptor, Mega Meowstic, Mega Glimmora, Mega Raichu X and Y, Mega Golisopod, Mega Baxcaliber, Mega Chimmcho, Mega, Golurk, Mega Scovillan, Mega Lucario Z, Mega Crabominable, Mega Tatsugiri, Mega Sceptile, Mega Blaziken, Mega Swampert, Mega Heatran, Mega Darkrai, Mega Magearna, Mega Zeraora, Primal Groundon, Primal Kyogre, Mega Rayquaza, mega Volcanion.
You get these Pokemon by Hyperspace portals going from 1-5 stars in difficulty, 5 being the hardest. Hoean megas are form online ranked battles, mega hoean legends and primal are post dlc and mega mythical, are post post game other than Darkrai. Mega Darkrai is final boss in the main story of the dlc, Mega Meatran, Meowstic, Staraptor, Tatsugiri, Absol Z are all through the main game of the dlc. All the other new megas from this are Hyperspace Sidequests.
I think that is all. Hope this monstrous list helps
