Oh venerable moth, channel the power of nature and let me receive your wisdom! Shower it on me like drops of dew on the early morning moss! Bestow it upon me as the young sapling, straining through dark branches for the sun! Let me bask in your knowledge like the forest breeze, dancing over the toadstool! No? Absolutely not? Oh. Alrighty then.
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).