Welcome to the Forums Ninjaxe. Your theory makes sense, but there's one flaw: Rats were thought of by Lorne during the development of Oddworld: Munch's Oddysee, while the character of Squeek has been around in Lorne's mind for years.
That's not to say Squeek won't be a rodent-like creature. You have to wonder where the name Squeek comes from. But then, where did Munch's name come from?
Lobo, it's never been suggested by any official sources that Squeek will be a parasite. We've had a fleeting mention by Lorne that Squeek's Oddysee features symbiotic creature relationships, and people have interpreted this in very direct, specific ways.
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