Hamtaro Season 1 Episode 173 Ham-Ham Halloween ( Air Date 2003-10-31 ) Genre Animation, Action & Adventure, Kids category. Overview "The Ham-Hams decide to have a costume party for Halloween. They go into the forest by the park for the party when they are ambushed by the Halloween Phantom and Wolf-Ham, who turns out to be Auntie Viv and Elder Ham.".