ok, here's what i did...i ran around randomly to every place and got into at least 6 battles per route then went on. i got it in about 45 minutes...of course, i missed it as i didn't have my wobuffet on me...anyway, once i had seen it, i flew to cerulean..or celadon..the one with misty...and flew there if it wasn't in the area until one of the times it was. at that point, i picked one of the 3 routes that it wasn't at ( the one up and to the left worked most of the time for me) and went there. if it followed, i'd battle it and try to catch it. if i did, yay. if not, lather rinse, repeat
and how do you trade pokemon from colleseum? please be explicit