Don't know the difference between a moth and a butterfly? Well that makes me MAD! The kind of mad that requires a lot of EYELINER and SPIKEY JEWELRY!! You probably don't even know that butterflies make a chrysalis, but moths make a COCOON! Ugh! *Guitar solos away*!!
Imagine an infinite number of alternate dimensions, sliced thin like salami and all layered together in a delicious sandwich of universes. In these parallel strata of time and space, the Squishables are very, very different. Squishable Alter Egos are all the Squishables that might have been (and almost certainly still are...somewhere).