For some strange reason, the majority of Gen IV escapes my mind. Not sure as to why. I mean, I had and played Platinum, but I barely remember any of the Pokemon except for the starters and my favorites.
Sealeo. I didn't even remember it existed until a Youtuber obtained one in his Emerald Nuzlocke.
X/3DS FC: 1289 8751 6620 In-game name: Karen
Claims: Nidoqueen, Mawilite, Hondew Berry, Fiery Dance, Flower Veil
Claims (other): Luke Triton (Professor Layton), Naoto Shirogane (Persona 4)
Skyworld Warriors, a Kid Icarus fan club
Friend Safari: Poison (Kakuna, Swalot, Whirlipede)
Most Gen 2 Pokemon for me... Sometimes, some non-popular Gen 1 Pokemon receive the treatment too (Venonat, for example...)
This Mega Blastoise is nicknamed "Zexy". Fact.
Mantyke is the only Pokémon I keep on forgetting despite the fact that it looks adorable.
Dunsparce, I've not played 2nd Gen much , but this pokemon is the most forgettable.
Smart enough to use forth in the wrong context
Claims: Metagross and Travis Touchdown
White 2 Friend Code: 3526 1992 5445
X Friend Code: 2277-6855-9052 (Trainer name: Mariana)
Claims: Mantyke - Dragon Skull - NeverMeltIce
Ekans, Paras, Parasect, Venonat, Weepinbell, Shellder, Kingler, Igglybuff, Natu, Unown, Qwilfish, Teddiursa, Corsola, Porygon2, Stantler, Whismur, Skitty, Delcatty, Meditite, Medicham, Gulpin, Swalot, Carvanha, Spoink, Grumpig, Cacnea, Barboach, Anorith, Castform, Shuppet, Chimecho, Clamperl, Huntail, Gorebyss, Relicanth, Jirachi, Mothim, Chingling, Stunky, Bonsly, Mime Jr., Chatot, Hippopotas, Hippowdon, Carnivine, Finneon, Lumineon, Mantyke, Rhyperior, Porygon-Z, Heatran, Phione, Manaphy, Victini, Munna, Musharna, Maractus, Minccino, Cinccino, Cryogonal, Druddigon, Rufflet, Braviary, Vullaby, Mandibuzz, Heatmor, and Durant.
Oddly enough, usually, the first two Pokemon that come to my mind after thinking about something else completely unrelated are Dunsparce and Delibird. I've actually used Dunsparce before, and it was unexpectedly useful.
Avatar by Nyjee on deviantART
I have claimed: Staraptor (01/12/13), Shiny Stone (02/12/13), and Limber (02/12/13).