Well, as with Colosseum you can Snag a certain amount of Pokémon. They are shadow Pokémon and require purifying. Here is a list of them, in order of catching with levels, trainer and locations:

Picture No. Name Level Location Trainer Name Gender
#133 Eevee Lv. 10 Starter You 87.5% Male ♂
12.5% Female ♀
#216 Teddiursa Lv. 11 Krane's Lab Spy Naps 50% Male ♂
50% Female ♀
#165 Ledyba Lv. 10 Gateon Port Casual Guy Cyle 50% Male ♂
50% Female ♀
#261 Poochyena Lv. 10 Gateon Port Bodybuilder Kilen 50% Male ♂
50% Female ♀
#228 Houndour Lv. 17 Cipher Lab Cipher Peon Resix 50% Male ♂
50% Female ♀
#343 Baltoy Lv. 17 Cipher Lab Cipher Peon Browsix Genderless
#363 Spheal Lv. 17 Cipher Lab Cipher Peon Blusix 50% Male ♂
50% Female ♀
#179 Mareep Lv. 17 Cipher Lab Cipher Peon Yellosix 50% Male ♂
50% Female ♀
#316 Gulpin Lv. 17 Cipher Lab Cipher Peon Purpsix 50% Male ♂
50% Female ♀
#273 Seedot Lv. 17 Cipher Lab Cipher Peon Greesix 50% Male ♂
50% Female ♀
#167 Spinarak Lv. 14 Cipher Lab Cipher Peon Nexir 50% Male ♂
50% Female ♀
#322 Numel Lv. 14 Cipher Lab Cipher Peon Solox 50% Male ♂
50% Female ♀
#285 Shroomish Lv. 15 Cipher Lab Cipher R&D Klots 50% Male ♂
50% Female ♀
#318 Carvanha Lv. 15 Cipher Lab Cipher Peon Cabol 50% Male ♂
50% Female ♀
#301 Delcatty Lv. 18 Cipher Lab Cipher Admin Lovrina 25% Male ♂
75% Female ♀
#100 Voltorb Lv. 19 Cave PokéSpot Wanderer Miror.B Genderless
#296 Makuhita Lv. 18 ONBS Station Cipher Peon Torkin 50% Male ♂
50% Female ♀
#037 Vulpix Lv. 18 ONBS Station Cipher Peon Mesin 50% Male ♂
50% Female ♀
#355 Duskull Lv. 19 ONBS Station Cipher Peon Labor 50% Male ♂
50% Female ♀
#280 Ralts Lv. 20 ONBS Station Top Cipher Peon Feldas 50% Male ♂
50% Female ♀
#303 Mawile Lv. 22 ONBS Station Top Cipher Cmdr. Exol 50% Male ♂
50% Female ♀
#361 Snorunt Lv. 20 Phenac Mayor's House Cipher Peon Exinn 50% Male ♂
50% Female ♀
#204 Pineco Lv. 20 Phenac Mayor's House Cipher Peon Gonrag 50% Male ♂
50% Female ♀
#177 Natu Lv. 22 Phenac Training School Cipher Peon Eloin 50% Male ♂
50% Female ♀
#315 Roselia Lv. 22 Phenac Training School Cipher Peon Fasin 50% Male ♂
50% Female ♀
#052 Meowth Lv. 22 Phenac Training School Cipher Peon Fostin 50% Male ♂
50% Female ♀
#220 Swinub Lv. 22 Phenac Stadium Cipher Peon Greck 50% Male ♂
50% Female ♀
#021 Spearow Lv. 22 Phenac Stadium Cipher Peon Ezin 50% Male ♂
50% Female ♀
#088 Grimer Lv. 23 Phenac Stadium Cipher Peon Faltly 50% Male ♂
50% Female ♀
#086 Seel Lv. 23 Phenac Stadium Cipher Peon Egrog 50% Male ♂
50% Female ♀
#337 Lunatone Lv. 25 Phenac Stadium Cipher Admin Snattle Genderless
#299 Nosepass Lv. 26 Phenac Stadium Wanderer Miror. B 50% Male ♂
50% Female ♀
#335 Zangoose Lv. 28 Cipher Key Lair Thug Zook 50% Male ♂
50% Female ♀
#175 Togepi Lv. 25 Outskirt Stand Hordel 87.5% Male ♂
12.5% Female ♀
#239 Elekid Non Shadow Lv. Equal To Togepi Outskirt Stand Trade Togepi back to Hordel 75% Male ♂
25% Female ♀
#046 Paras Lv. 28 Cipher Key Lair Cipher Peon Humah 50% Male ♂
50% Female ♀
#058 Growlithe Lv. 28 Cipher Key Lair Cipher Peon Humah 75% Male ♂
25% Female ♀
#090 Shellder Lv. 29 Cipher Key Lair Cipher Peon Gorog 50% Male ♂
50% Female ♀
#015 Beedrill Lv. 30 Cipher Key Lair Cipher Peon Lok 50% Male ♂
50% Female ♀
#017 Pidgeotto Lv. 30 Cipher Key Lair Cipher Peon Lok 50% Male ♂
50% Female ♀
#114 Tangela Lv. 30 Cipher Key Lair Cipher Peon Targ 50% Male ♂
50% Female ♀
#012 Butterfree Lv. 30 Cipher Key Lair Cipher Peon Targ 50% Male ♂
50% Female ♀
#082 Magneton Lv. 30 Cipher Key Lair Cipher Peon Snidle Genderless
#049 Venomoth Lv. 32 Cipher Key Lair Cipher Peon Angic 50% Male ♂
50% Female ♀
#070 Weepinbell Lv. 32 Cipher Key Lair Cipher Peon Angic 50% Male ♂
50% Female ♀
#024 Arbok Lv. 33 Cipher Key Lair Cipher Peon Smarton 50% Male ♂
50% Female ♀
#057 Primeape Lv. 34 Cipher Key Lair Cipher Admin Gorigan 50% Male ♂
50% Female ♀
#097 Hypno Lv. 34 Cipher Key Lair Cipher Admin Gorigan 50% Male ♂
50% Female ♀
#055 Golduck Lv. 33 Citadark Isle Navigator Abson 50% Male ♂
50% Female ♀
#302 Sableye Lv. 33 Citadark Isle Navigator Abson 50% Male ♂
50% Female ♀
#020 Raticate Lv. 34 Citadark Isle Chaser Furgy 50% Male ♂
50% Female ♀
#085 Dodrio Lv. 34 Citadark Isle Chaser Furgy 50% Male ♂
50% Female ♀
#083 Farfetch'd Lv. 36 Citadark Isle Cipher Admin Lovrina 50% Male ♂
50% Female ♀
#334 Altaria Lv. 36 Citadark Isle Cipher Admin Lovrina 50% Male ♂
50% Female ♀
#115 Kangaskhan Lv. 36 Citadark Isle Cipher Peon Litnar 0% Male ♂
100% Female ♀
#354 Banette Lv. 37 Citadark Isle Cipher Peon Litnar 50% Male ♂
50% Female ♀
#126 Magmar Lv. 36 Citadark Isle Cipher Peon Grupel 75% Male ♂
25% Female ♀
#127 Pinsir Lv. 35 Citadark Isle Cipher Peon Grupel 50% Male ♂
50% Female ♀
#219 Magcargo Lv. 38 Citadark Isle Cipher Peon Kolest 50% Male ♂
50% Female ♀
#078 Rapidash Lv. 40 Citadark Isle Cipher Peon Kolest 50% Male ♂
50% Female ♀
#106 Hitmonlee Lv. 38 Citadark Isle Cipher Peon Petro 100% Male ♂
0% Female ♀
#107 Hitmonchan Lv. 38 Citadark Isle Cipher Peon Karbon 100% Male ♂
0% Female ♀
#108 Lickitung Lv. 38 Citadark Isle Cipher Peon Gefta 50% Male ♂
50% Female ♀
#123 Scyther Lv. 40 Citadark Isle Cipher Peon Leden 50% Male ♂
50% Female ♀
#113 Chansey Lv. 39 Citadark Isle Cipher Peon Leden 0% Male ♂
100% Female ♀
#338 Solrock Lv. 41 Citadark Isle Cipher Admin Snattle Genderless
#121 Starmie Lv. 41 Citadark Isle Cipher Admin Snattle Genderless
#125 Electabuzz Lv. 43 Citadark Isle Cipher Admin Ardos 75% Male ♂
25% Female ♀
#277 Swellow Lv. 43 Citadark Isle Cipher Admin Ardos 50% Male ♂
50% Female ♀
#143 Snorlax Lv. 43 Citadark Isle Cipher Admin Ardos 87.5% Male ♂
12.5% Female ♀
#062 Poliwrath Lv. 43 Citadark Isle Cipher Admin Gorigan 50% Male ♂
50% Female ♀
#122 Mr. Mime Lv. 43 Citadark Isle Cipher Admin Gorigan 50% Male ♂
50% Female ♀
#051 Dugtrio Lv. 40 Citadark Isle Cipher Peon Stron 50% Male ♂
50% Female ♀
#310 Manectric Lv. 44 Citadark Isle Cipher Admin Eldes 50% Male ♂
50% Female ♀
#373 Salamence Lv. 50 Citadark Isle Cipher Admin Eldes 50% Male ♂
50% Female ♀
#105 Marowak Lv. 44 Citadark Isle Cipher Admin Eldes 50% Male ♂
50% Female ♀
#131 Lapras Lv. 44 Citadark Isle Cipher Admin Eldes 50% Male ♂
50% Female ♀
#249 Lugia a.k.a. XD001 Lv. 50 Citadark Isle Cipher Boss Greevil Genderless
#144 Articuno Lv. 50 Citadark Isle Cipher Boss Greevil Genderless
#145 Zapdos Lv. 50 Citadark Isle Cipher Boss Greevil Genderless
#146 Moltres Lv. 50 Citadark Isle Cipher Boss Greevil Genderless
#128 Tauros Lv. 46 Citadark Isle Cipher Boss Greevil 100% Male ♂
0% Female ♀
#112 Rhydon Lv. 46 Citadark Isle Cipher Boss Greevil 50% Male ♂
50% Female ♀
#103 Exeggutor Lv. 46 Citadark Isle Cipher Boss Greevil 50% Male ♂
50% Female ♀
#149 Dragonite Lv. 55 Gateon Port Wanderer Miror. B 50% Male ♂
50% Female ♀