>>12550566649 + the 10-ish we know about from X and Y. Be warned, if you DO really want to catch 'em all in terms of plushies, the less popular mons tend to not get very much in the way of merch by virtue of no one buying them.
Of course, there's fan-made plushies and figures. (Pic related.) But those will rack up a massive tab REALLY quickly.