Fat and inflated Pokemon got fun reactions from him before when I was using them. Also, there were pony-fied Pokemon, which I'm sure you remember. The only thing is finding good artwork in those categories. Alternatively, you could stick with "cute" (and, to an extent, "girly-looking") Pokemon like Vulpix, Eevee, etc., but they don't have the same impact as the others.
...You do know that just light and indirect humor was all I every meant with my previous avvies, right?