going over how i have structured the posting rules in the past, i think that if you posting just drawings for cloths from the series is fine, but characters must either be from the series or be from your fan fiction with in the lombax univurse/ adjecent to it, so if your characters are related in any way at all to a fanfiction version of the ratchet and clank univurse its perfectly fine. but if they are not related not so much.
I think that made sence let me know if my rambling left anything unclear