Quoted from TwilightZone:How do they compare to the WoZ Emerald Edition? That cab in particular is incredible. Might be same cab art on the Ruby Red, but I'm not sure.
Its the exact same process since Charlie was a JJP employee before starting Spooky and was the one that brought the idea of the "butter" cab to JJP for the Emerald edition. When he left and started Spooky, he took his idea with him and made it available on Spooky pins while JJP never did it again.