Monstruos de Matutano: crazy monster figures from Spain

Bottom photo courtesy of TwoHeadedBoy

So, there's these wacky-looking plastic monsters that I've come across photos of quite often, but until recently hadn't really been able to place. The above images show a handful of them. Over the past month or two I got the three shown in the top photo, and TwoHeadedBoy (who runs the blog on neglected comics called TwoHeadedThingies--check it out) was kind enough to contribute the other photos in this post of additional Monstruos from his collection.

After doing some more research on them, below is what I've been able to find out about them (leave a comment if you have any corrections or additional info):

Photo courtesy of TwoHeadedBoy

• They are premiums called "Monstruos de Matutano" that came in snack bags and/or cereal boxes in the late-1970s to early-1980s, originating in Spain and Portugal and later being reproduced in South America.
• The names "Disvenda," "Tito" and "Dunkin" are also commonly listed in association with them, although I'm not sure if those are company names, product names, or what.
• There are 20 different sculpts. You can see them all on the blog Figuras Promocionales (just search "monstruos" on the page).
• They are made of hard plastic.
• They were released in an undetermined amount of monochromatic colors. I've seen them in basic primary colors such as red, blue and yellow, plus others like light pink, purple and black.
• The sculpts range from almost-human creatures to truly bizarre monstrosities (for a prime example see the blue guy in the first photo above with the light hanging off his head and a little dude sitting in his chest).

The blog MiniToys Peru also has a post devoted to these guys that shows all 20 sculpts as versions I assume would have been released in Peru based on the site's name. Despite having taken four years of Spanish in high school, I still have to put pretty much all Spanish language stuff into an online translator, so I did with the first paragraph of the post. And here's what came back:

Photo courtesy of TwoHeadedBoy

One day, of child, in one of these breakfasts prepared like paste to do comets(kites), touched me a plastic monster inside the Oats bag(Stock Exchange) 3 Toy bears. A bug(small animal) with three paws, a lantern in the tail(cola) and eyes of having smoked marijuana the whole night.

I think that about says it all.

What do you think about the Monstruos de Matutano? Have you ever come across any before? Do any of the sculpts in particular stand out to you?