Because if you get over your issue with their designs, you might realize they're actually decent?
Simisear is Magmortar/Delphox with Nasty Plot.
I actually like their designs....or at least mostly Simisage. the other two are ok, not my favorite though....and your right they actually aren't terrible. They aren't Garchomp either, and I think thats the issue people have.
A long time ago someone asked me why Pokemon doesn't have NewGame+. I have not heard a more valid question since. fc:0602-6823-9646, SV:932,FS:electric.