Wonderfest dealers do go through the trouble to get licenses when they sell items based on tokusatsu and anime characters. The licenses are granted by Tsuburaya, Tatsunoko, etc., and they have very specific language about pricing, run numbers, etc., and they only give the licensee permission to sell on that day, in that location.

It's a different story with RxH, and other outfits that have their own original characters. If Gargamel wants to make a version of an RxH toy, the issue of run size is just between those two companies. I'm sure the process is much less formal and a little less restrictive between pachi kaiju makers, rather than dealing with a behemoth like Sunrise.