This is something I’ve been wanting to put together for a while now.
While things like Sonic’s love of chili dogs and the concept of a “roboticizer” are obviously influenced from western Sonic media, I acknowledge that all of the other examples could easily be simple coincidences.
Also, I wanted to focus on games developed by Sonic Team specifically, which is why I left out games like Sonic Spinball and Sonic Chronicles.
There could be more examples that I missed, but these were the ones on the forefront of my mind.
EDIT!:@sorcererlance pointed out that I forgot to include the bit about the name Robotnik becoming universally canon. I’m such a ninny! D: