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Kabumpo is known for his wisdom in Pumperdink, but that might be because he shines in comparison with other members of the court. He is overbearing, sarcastic, and extremely vain, but good-hearted.
Since the expiration of his first novel's copyright on 1 January 1998 (the last Thompson book to enter the public domain before the Copyright Term Extension Act took hold), Kabumpo may be used freely by any author. Of his Thompsonian appearances, only Purple Prince remains under copyright, with the expiration date being 1 January 2028.
References
^Jack Snow, Who's Who in Oz, Chicago, Reilly & Lee, 1954; New York, Peter Bedrick Books, 1988; p. 115.