Is it possible to be admitted to a Master's program after not completing Bachelor's degree due to academic dishonesty?
I don't think there's much room for optimism. Offers of graduate admission are generally preconditioned on actually completing the previous degree. Moreover, having your previous degree candidacy terminated on account of academic dishonesty will make you "radioactive"; very few graduate schools are going to want to bring in someone who got suspended for plagiarism or cheating. (Given that the entire research enterprise hinges on being able to trust reported results, why would a school want to take a chance on someone who has already clearly violated those principles?)

[More generally, however: I do know of an economics professor whose PhD is in fact his only degree; however, the circumstances behind that are so unusual that they're unlikely to be replicated any time soon. (Basically, he followed a professor from Germany to the US while he was still an undergraduate in the days when the Diplom system was in full force.)]