Mother 3 had a long development cycle, starting on the SNES, then moving to the 64DD, before ultimately being released as one of the last Game Boy Advance titles. Even then, only in Japan, meaning that fan translations were required to play the game in English.
Pictured here is a low-quality image of the Ostrich Burgers Historic Summit Inn Cafe on Route 66. It's possible that it was simply inserted into the game to test how the game displayed graphics. It seems to closely resemble the Dur-T Cafe found during the Highway section of Chapter 5. The cafe itself would be destroyed by the Blue Cut Fire in 2016, though the owners plan to rebuild it as it was before.