Bobby has an egg-shaped head and rounded square-shaped mouth. He also has skinny arms with small hands. He then later gain much plumper arms for his live hands in the seventh and eighth season.
Crank Yankers early to mid Season 2 (2003)
For Season 2, Bobby's arms changed to live hands and his soda cans are changed to green.
Crank Yankers late Season 2 (late 2003-2005)
Starting in Episode 21, Bobby had a straighter mouth. His nose is also a bit shorter.
Crank Yankers Season 4 (2007)
In the fourth season, the puppet sports blue soda cans, a brown vest, and a blue shirt, mainly for chroma-key scenes. In one episode, he sports rod arms that was back in 2002.
Crank Yankers Promotional photo (2019-present)
For the fifth season revival, Bobby's hair is now more vibrant in color. His head has a more egg head shape, and his outfit is a black shirt and jeans with overall straps. Also, he has new "El Brazo" soda cans, smaller pupils, and his nose is noticeably a bit small and taller.