Ironically enough gen 1 is the only game that I completed the dex. And it really wasn't worth the effort either unfortunately. My brother and I each had a friend over, we had 4 gameboys, 2 red version, 2 blue, 2 link cables. About 100 trades and a bunch of reset games later (and a bunch of Rattata used for trade fodder), we finally had a situation where we could all complete the pokedex. And the one guy who didn't reset his game (the oldest guy, surprise surprise) had the full pokedex, so time to collect his Mew, right? Wrong, he just got a crappy diploma that you can apparently print with a gameboy printer. Lame.
And about a month later we find out about the cloning glitch. Damn that was a wasted afternoon, LOL.