I got 102/152 (some of you probably forgot missingno. WHERE'S YOUR POKERAP NOW?!)
I feel so bad, I've got a poster in my room that shows all 151 pokemon, I look at it everyday...I've seen like three series of pokemon, four movies (I have the soundtrack for the first one) and I've played at least one game from every generation, played all three from red/blue/yellow.
I really should have gotten more, spelling was an issue (I kept trying to spell things "incorrectly" like Onyx instead of Onix, Ninetales instead of nintales etc.), but I forgot quite a few anyway.
I forgot what the evolution of spearow was (which I kept trying to spell as "Sparrow", before I remembered), forgot the evolution of Seel (I kept putting Seeleo which is the second evo of the walrus pokemon in ruby/sapphire/emerald)...Forgot the first evo of Omastar, Cloyster (I kept thinking it was Shelldon instead of Shellder), Electrode (I thought it was voltobe instead of voltrobe e.e) plus a whole lot of ones that I forgot completely like Ekans.