IF anyone has played this game there are two bosses that come to mind that are hard beside WizPig and the 1st race for most people you have this Octopus and I have to say that his races while not a real pain in the butt but since your in a hover craft makes things harder but that is just me who says that.
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https://www.youtube.com/watch?v=2Mw1j47v44A