Our own Horus Kemwer of Against the Modern World chimes in with his Halloween entry! I think you'll enjoy, especially if you watch the clips.
Underappreciated monster movie? Perhaps. Have you ever heard of it? Probably not. Bizarre, inexplicably nutty, yet strangely compelling cultural artifact from across the border? Definitely.
It's Caperucita y Pulgarcito Contra Los Monstruos (1962) from "the other Roberto Rodriguez."
The title is usually translated as "Little Red Riding Hood and Tom Thumb vs. The Monsters," but like everything else about this movie, it works better in Spanish. (Important tip: if you watch it, do so with subtitles, not the by all accounts atrocious dubbing.)
The film pits the tiny tots Little Red Riding Hood and Tom Thumb (along with their trusty, and extraordinarily annoying skunk side kick) against "all the monsters we have known in fairy tales." These monsters apparently hang out in a castle together in "The Kingdom of Evil" plotting against our two heroes. Their sheer goodness (and their apparent ability to sometimes convert monsters from the path of evil) is enough to incur the wrath of the combined monster forces from all fairy tales (and classic novels, apparently, as Frankenstein's monster and Dracula are amongst the bunch).
Another category of "fairy tale" appears to be Disney movies, judging by the appearance of characters both good . . .
. . . and bad.
Still, the camps is hilarious, the kids are charming, and the songs good for a laugh. You won't be scared, but you will be astounded. And let's not forget the fight scenes:
And, as with all genre-crunching artifacts from foreign cultures, there's much that seems oddly out of place—e.g. sexual innuendo between Dracula and the Witch, torture scenes, and an invocation of Satan. Have no fear though, the movie is still resolutely G rated, aimed squarely at children from the planet Mars.
[Sorry, no costume stories - Horus doesn't wear costumes on Halloween.]