Karis wrote: If this was a game, I'd play it!!
Why - it's the same exact game with tons of battle sprites moved around.
From left to right, top to bottom - Bulbasaur, Ivysaur, Venasaur, Charmander, Charmeleon, Charizard, Squirtle, Wartortle, Blastoise, Caterpie, Metapod, Butterfree, Rattata, Raticate, Pikachu, Raichu, Sandshrew, Sandslash, Clefairy, Clefable, Farfetch'd, Gengar, Haunter, Gengar, Onix, Marowak, Lickitung, Goldeen, Seaking, Snorlax, Articuno, Zapdos, Moltres, Dratini, Dragonair, Dragonite, Mew, Mewtwo, Pichu, Cleffa, Marill, Azumarill, Misdreavus, Steelix, Stantler, Smeargle, Raikou, Entei, Suicune, Poochyena, Mightyena, Linoone, Taillow, Swellow, Wingull, Pelliper, Gardevoir, Surskit, Masquerain, Shroomish, Breloom, Whismur, Loudred, Exploud, Makuhita, Hariyama, Azurill, Nosepass, Skitty, Delcatty, Mawile, Aggron, Gulpin, Swalot, Spheal, Flygon, Zangoose, Baltoy, Claydol, Feebas, Milotic, Tropius, Chimecho, Absol, Snorunt, Beldum, Metang, Metagross, Rayquaza, Jirachi, Staravia, Staraptor, Combee, Vespiquen, Chingling, Lickilicky, Froslass (?), Tangrowth, Porygon2, Porygon-Z, Magnezone, ????, ????, ???? (are they ALL Shamin?), ???? (#128 is Tauros...), ????, ????, Empoleon, (alternate Clefable?), Miku Hatsune
The last 2 rows were tough - I don't know the D/P PokeMon.