So, in terms of crowd chants for K. Rool, I can think of two possibilities:
--Take a bunch of Kremling noises from the DKC games or DK64, mix them together and create a sort of group cheer, kind of like what Ridley has now with the Space Pirates
--There's a clip from the DKC cartoon where K. Rool runs for office, and all of the Kongs are somehow supporting him and chanting "K. Rool for future ruler! K. Rool for future ruler!"
Either would work fine, they'd just take a little bit of work to put together. Strangely enough, the obvious situation where he's in front of a crowd in DK64 doesn't have anything really usable, just generic crowd noises.