Thats like saying don't cosplay something that isn't popular.
How many series are still running when you go to your con. Are you making your cosplay in a week or something? for me technically it's not Ended here[in the USA] because it never even started so everything is fair game.
some times that older anime cosplay will make someones day :3
*** Cosplay gathering @ Magfest 2014?
-*- In search of cheap light color wig to practice dying
... And to answer that question "Yes I live here and have nothing better to do "
Gumi Cats Life - Vocaloid 100%
Shiroyasha - Mondaiji-tachi 0%
Human luna - Sailor moon 0%
Saturday -Eevee Gijinka - Pokemon redesign 10%
Shiny Shaymin Gijinka -done.