To prevent the following being a tl;dr (too long, didn't read): **Gen #1 & #5 yes**
First Gen yes, due to Mew as a give away during Red-Blue mall tours in my city. Don't recall the year but Yellow was as yet unreleased so happened before whatever that American date would be.
Gen Two no, due to Celebi. Gen Three no, as no Mew, Celebi, Deoxys; got Jirachi from that bonus disc. Gen Four legit would be a no as is a yes technically and yet my Arceus being in Master Ball, english letters, from Hall of Origin.. has my Gen Four cancelled.
Gen Five yes due to Dream World Arceus and assuming a release of Meloetta, as its Meloetta for keeping it currently complete.
xbL gT @ megatr0n e5kim0 ^^^ Casual player of Pokemon and Animal Crossings. Currently Lv. 10ish in Borderlands 2
I've probably got every pokemon if you combine all the games I have. In fact I'm relatively sure of that.
But I've never actually consolidated them all into one single game. There's probably a couple pokemon I have in Gen3 and never transfered (legends), ditto for Gen4, and even within Gen5 I've got certain pokemon I only have in certain games, not put into a single one.
Does that "count"? Depends on your on view, I suppose. I've never actually completed a pokedex, so if thats what you're going by then I guess the answer is no.
~ Master of Electricity ~ Electro: 0518-6613-7620 - Pokemon White
99% legit. I'm fairly certain my Celebi and Keldeo are hacked. Though maybe not Celebi, can't remember if HG/SS had a wi-fi giveaway for it or not, but if it did then I've definitely got a legit one somewhere.
Plus can't account for whatever other non-legit but legal pokÚs are in my boxes that were received through trade, since, well...you never really know.