I actually sort of like the idea, though it could be open to abuse. (A couple of trolls could mass dump bidoofs or something.)
Still, if tweaked I think it could work. Have the available Pokemon change up each day, and have like, 30 or so, rather than everything. And have the Pokemon sifted and sorted by some sort of AI that'll give you a good mix.
Obviously you won't find anything great, but it'd be nice for the pokedex. And also consider people who mass breed for shinies. Those extra go somewhere. There's always a chance you'll find something halfway decent.
It would end up filled with Abra, Chansey/Happiny, Shroomish, Shellder, Timburr, Phanpy, Dratini, Diglett, Eevee, Ferroseed, Pineco, Gible, Shellos, Gastly, Gligar, Magikarp, Axew, Hippopotas, Chimchar, Frillish, Riolu, Magnemite, Swinub, Beldum, Vulpix, Poliwag, Solosis, Rotom, Bagon, Scyther, Skarmory, Staryu, Tentacool, Croagunk, Larvitar, Bulbasaur, and Larvesta that people hatched but didn't get the IVs they wanted.
Edit: Courtesy of Smogon, all breedable OU Pokémon's first forms. (I also used a bit of Pokémon knowledge, though)
For those of you starting topics about the PS4, there's a PS4 board: http://www.gamefaqs.com/boards/691087-playstation-4
Maybe a multi-zoned place? Each zone could hold a certain type/types of pokemon released. All would be designed to look as in ruins or abandoned.
Deserted Plaza: Normal, Fighting, Water (a water section near the middle?) Forgotten Observatory: Electric, Steel, Dark, Ghost, Psychic Outcast Isle: Fire (maybe the isle has a volcano?), Water, Grass, Flying Lonely Cave: Ground, Rock, Dragon, Ice Lost Garden: Grass, Bug, Poison, Ground
Or, if working with wi-fi, the game would allow to enter the "place where released pokemon go" and shuffle between the areas each day (with a set amount of # of pokemon able to come back). Pokemon found could retain OT data, as well as other stats, and shininess.
There's a lot of potential with this idea, and I'd love to play around with this a little more.
EDIT: Think of it as the Dream World, but without the use of a computer. Is the 3DS even capable of doing that?
3DS FC: 3437-4145-0175 PKMN White 2 FC: 0433-6133-8662