Chansey
At the Safari Zone, there is an area of grass where I found 7 Chanseys in one Safari visit. To get to it you have to go through the path to the right once you enter. Then loop all the way around and go through the other path. Then you go up the second set of stairs that you come across while walking left. Go down the stairs and (If you have surf) surf across one of the two water rectangles. If you don't have surf then just follow th path and you will come to a big patch of grass in the corner. That is where I found 7 Chanseys and 2 Tauros.
Hope I Helped.
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