>>1177624Does /a/ have an archive? If I were you I'd just google "/a/ archive" and then search Nightwalker on their, you'll probably find it. But you may have some trouble since Google ignores forward slashes.
As for monster of the week shows, as the other anon said there's a lot of /m/ stuff that's monster of the week, GaoGaiGar is an excellent one, Mirai Keisatsu Urashiman isn't so much monster of the week but it's definitely "evil plot of the week", Sailor Moon and a lot of magical girl shows are as well, and if you're open to live action stuff then a lot of that is monster of the week, say Kamen Rider or Ultraman. If you can handle old 70s cheesiness that's obviously a kids show, I think as far as monster of the week stuff goes then the original Kamen Rider's still one of the best, alternatively you could go for Black which is also very well liked.