[Ragnarok-X]

i think he was referring to the fact that tigers and certain bandar are size 3. That means only 2 instead of usually 3 units will get into a square which again means you will likely have your 2 tigers or bandar be paired against 3 human-sized guys. As such, the humans will get more attacks in on the bandar, since they outnumber the size 3 guys. In addition to more attacks on each size 3 guy, they also get the def-reduction applied.