Which famous brand mascot underwent this REAL transformation in their official design history?

Brand mascots are powerful marketing tools that can become cultural phenomena in their own right. From Chester Cheetah to the Michelin Man, these characters have sometimes transcended their advertising origins to become pop culture icons. This trivia question tests your knowledge of a famous mascot's evolution through the decades - can you identify which transformation actually happened in the character's official history?

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Tony the Tiger evolved from walking on all fours to becoming bipedal (standing on two legs) in the 1970s
The Pillsbury Doughboy was originally blue in color until focus groups preferred white in 1969
Ronald McDonald was reimagined as a fitness guru with athletic clothes during the health food movement of the 1990s
The M&M's characters were initially animated robots before being changed to anthropomorphic candies in 1960