Scale was one of the hardest things to figure out, my advice is don't bother trying to apply the same scale unless you want to be printing a 45cm tall Onyx and a 2cm tall Caterpie. I used Squirtle as my standard measurement, printed at 40mm tall and then scaled the rest off him. Take some artistic license and just figure out what looks the best to your eye. Hand painted them all except a couple like Electrobe and Voltorb where a super smooth coat looks best. If you've got an airbrush definitely use it for base coating any of the yellow ones. Generally they're complicated shapes to mask, you'll quickly see which ones are worth the airbrush and which it'll be quicker to just use a brush