CROSSOVER MADNESS

 I'm not a fan of the DC spook-books, but GHOSTS seems one of the weakest of the bunch. In issues #97-99, DC tried to pump some energy into it by having a meaningless "teamup" between Doctor Thirteen and The Spectre. The title concluded (appropriately enough) thirteen issues later.

RAR #99: STRONG BOW

 Though heroic ranch-owner Spurs Jackson was the star of all six issues of SPACE WESTERN, backup stories included some solo stories by his two buddies, Hank Peters and the Indian (possibly Pueblo) Strong Bow. The latter, despite being a typical laconic Red Man, gets the only good joke in the series.

And in SPACE WESTERN #42, Strong Bow has to help his people fight off "Aztecs from Vulcan," who are masters of fiery technology.

CROSSOVER MADNESS

 I never expected to find a villain-crossover in the pages of the short-lived SPACE WESTERN COMICS (six issues). But after separate stories introduced such interstellar evildoers as "Korok of Mars" and "Vodor of Venus," the two of them teamed up and tried to destroy Earth, only to be thwarted twice by SPACE WESTERN's heroic modern-day cowboy, Spurs Jackson.

First, the two schemers sent mole-like creatures from Earth's moon-- somehow living there by boring into the ground-- to wreak damage on Spurs' homeworld.

Then in one last story, the villains seek to destroy Earth with a comet. They fail and the title died before they were permanently captured by the cowboy crusader.

 
  

CROSSOVER MADNESS

 Most manga serials didn't delve into any crossovers, but GHOST SWEEPER MIKAMI (1991) crossed over the main character, Japanese exorcist Reiko Mikami, with the folkloric character of THE PIED PIPER OF HAMELIN.

 To be sure, it's really just a minor demon that tosses together a lot of tropes from the Pied Piper story and reworks them for its own convenience (much like the manga author), such as changing adult humans into children or controlling rat demons. But one could argue that it's still a loose adaptation of the original, though it counts only as a "high-charisma" crossover.

The manga got an adaptation into an episode of the 1993 TV anime, under the title "Everyone, Turn Into a Kid!" Again, the name "Piper of Hamelin" just gets cursory mention. 

Other manga-episodes, as well as their anime adaptations, brought the ghost-sweepers in contact with Santa Claus and with the Japanese folklore-figure Yuki-Onna. The one movie made from the franchise was not based on a manga from the author and has the GS team encounter a very Nippon-ified version of the vampire Nosferatu.