Vaarsuvius does seem to support Belkar's idea enthusiasticly enough in #835 11th, and making litterboxes from kobolds is definitely shenanigans, so this seems to be the most fitting answer so far. But if that's not it, then I'll try #1194, where Minrah supports Belkar's shenanigans of pretending to have character growth, as Lord Shojo advised Belkar in #606.
Update: hmm, maybe instead the enthusiastic supporter is Serini in the recent storylines.