Well Cressilia kinda makes sense because the moons light is really just the suns light reflected off the pale surface of the moon. Xatu is said to stare into the sun to tell the future, so maybe can absorb the suns rays? Togekiss is a normal type. Psychic types in general I can kinda get, psychic powers let you do a lot of cool shit. Dragons are in a similar boat. Everything else... just no. How about infernape wit Poison Jab/Gunk Shot? How the hell the does work?