When Spiderman got exported to japan in the 1960's, it was apparently just not weird enough for their tastes. They did quite a bit of off the wall tinkering and the result is a mind numbing, brightly colored explosion of strangeness with an incredibly excellent theme song.
Yeah, yeah, yeaaaaah… WOW! These shows are not available dubbed or subtitled in English, which only adds to the surrealness of watching. The episode we saw had a cowboy who was doing bad things for good reasons, two spruced up silver swathed bad guys, and an assembly line of mushroom men who grossly pushed out mushrooms from their skin and handed them to men dressed as ducks.
Your guess is as good as mine.