I started to like Pokemon in the Second Generation... so Pikachu wasn't it. I just started to like it, so I got a Pack. Those GSC ones where you got a Japanese Reverse Holifoil pokemon card with it. Golbat was the first one in there, and I got Pichu as the Reverse Holo. Twice.
I belive it was either Bellsprout or Zubat. For some reason, I keep thinking I had a discussion with some friends in Kindergarden about nameing Bellsprout Bell or Bella, which was kinda stupid. But I never found out about Pokemon until I was in First grade...
I remember almost exactly: In [first] grade, I and everyone else were working on a bat project, 'cause we were learning about 'em. One of meh friends named Garrett or something said to his friends: "Hey, this looks like a Zubat!". So, I asked them about it, and they showed me what it looked like on Blue version.
Well, I first encountered Squirtle from a poster that I truly gazed for a minute or two. ever since then, I keep on choosing squirtle as my starter pokemon as it was the first pokemon that I saw in my whole life