I think I only really got into Pokemon when they were only 151. I liked a couple of pokemons back then. I also liked Ash and Team Rocket. Team Rocket made me think of a modern Boris and Natasha. I was excited for the 1st movie. I went to see the 2nd movie too. But my fandom was dying right there with the 2nd.
I think that's pretty much the same way it was with me: I saw the first two movies, but I've lost count of how many movies they have (it's over seven right?), I don't even know how many incarnation of the TV series there is (and what gets really confusing is I remember by the time the second movie came out, Brock had disappeared, but he seems to be back now, and Misty seems to have disappeared at one point but also came back but seems to be gone again, I don't know).
I had the first 151 almost memorized, I had trouble memorizing the next 100 or so, but I remember of that new set of Pokemon, Marill was my favorite.