Green

Quote from the Pokemon XY game...
"The famous Professor Oak's Grandson came here to the Kalos Region to study abroad.  He got 'Bonjour' down just fine, but he still always said 'Smell ya later' when he left!"
...
...So, today we learn two things...
One, Game Freak has the same sense of humor as it's fanbase.
and, Two, hoping for Shigeru to show up in the anime is not completely hopeless.
:)