Mudmun as we say are one of the most underrated movie monster, and i think it just comes to how difficult execution must be to keep them noice and moist. Hedorah is a good monster that manages to look goopy despite being made of rubber, and he manages to pull off some great moves against Godzilla. The highlight obviously being when he pushed Godzilla into a pit and turned around to D U M P ass on him. The pure disrespect.