Haha, it's okay, not a big deal! :) I can still give u DW female Nidoran if u want (I have soooo many of them!), since they can breed to make both male AND female DW nidorans.
But yeah, since EEVEE has a red star, I cannot give you that at the moment.
So for your new order, might I suggest Nidoran over Tentacool? Or if you'd prefer to keep it Dratini+Pichu+Tentacool, that's cool too! It's just, you seemed like you only picked Tentacool cuz u thought u had to change 2 of em. You can still get that Sheer Force Nidoking, you just have to breed, then evolve the male offspring yourself ;)