In addition to the Wild Pokemon found hidden in the Wild Grasses and walking through the Overworld, there will be what are known as Strong Pokemon found in the Overworld of the Wild Area away from the Wild Grasses. These Pokemon vary from one section in the Wild Area to the next, and some only appear when there is certain whether conditions happening in certain spots. At the beginning of the game, these Pokemon will be far to powerful to capture. Instead, you will have to wait to find and capture them until you have grown in strength throughout the Main Story.
Available Wild Area Strong Pokemon
Pikachu, Clefable, Vileplume, Machoke, Machamp, Cloyster, Haunter, Gengar, Onix, Kingler, Weezing, Rhydon, Seaking, Gyarados, Lapras, Vaporeon, Jolteon, Flareon, Snorlax, Noctowl, Lanturn, Xatu, Bellossom, Sudowoodo, Quagsire, Espoen, Umbreon, Steelix, Shuckle, Piloswine, Octillery, Tyranitar, Linoone, Ludicolo, Shiftry, Pelipper, Kirla, Gardevoir, Ninjask, Manectric, Roselia, Wailmer, Flygon, Whiscash, Crawdaunt, Claydol, Milotic, Dusclops, Glalie, Roserade, Vespiquen, Gastrodon, Driftblim, Skuntnk, Bronzong, Mime Jr., Lucario, Drapion, Abomasnow, Weavile, Leafeon, Glaceon, Galalde, Dusknoir, Liepard, Mushrana, Unfezant, Gigalith, Excadrill, Conkeldurr, Palpitoad, Seismitoad, Crustle, Sigilyph, Garbodor, Cinccino, Vanillish, Vanilluxe, Jellicent, Galvantula, Ferrothorn, Klang, Kinklang, Beheeyem, Chandelure, Haxorus, Beartic, Golurk, Bisharp, Diggersby, Pangoro, Doublade, Aegislash,Barbaracle, Sylveon, Hawlucha, Gourgeist, Avalugg, Noivern, Vikavolt, Ribombee, Mudsdale, Araquanid, Shiinotic, Bewear, Tsareena, Golisopod, Mimkyu, Kommo-o, Greedent, Corviknight, Orbeetle, Thievul, Eldegoss, Dubwool, Drednaw, Boltund, Coalossal, Sandaconda, Cramorant, Grapploct, Hatterene, Grimmsnarl, Obstagoon, Perrserker, Cooperajah, Duraludon