IMPERIAL TOYS POP-UP
The Pop-Up release from Imperial Toys was unique for a number of reasons. Aside from Cheap Toys (and the Galloob prototypes), this is as close to an 'official' Garbage Pail Kids figure released during the 80's. In fact, these figures frequently appear on auction sites without their trashcans by people assuming they were standalone figures.
Another reason the pop-ups are unique is the decision by Imperial Toys to release them in four different phases. This is the only Imperial Toy to be released with the addendum "Assortment A" and "Assortment B" in the Imperial catalog. Furthermore, each assortment was released in two different packaging styes for a combined four product numbers.
The packaging above is the form seen 99% of the time. It is the typical cardboard backing with plastic bubble protecting the toy, designed to hang on hooks in store displays. The other packaging which has only been seen once was a large counter-top display which held 36 pop-up toys. The pop-ups were in a box roughly the same size as the pop-up themselves. One individual box sold on eBay in 2015 but that is the only example of this particular packaging to surface.
The back of each Pop-Up package contained pictures of the 24 different characters available. To build a complete set however one must acquire BOTH 'a' AND 'b' names for the Pop-Up! (Example: There is an Adam Bomb AND Blasted Billy)