Rich Moore, director of many classic The Simpsons episodes and director of Disney’s Wreck-It Ralph, shared a funny SEGA anecdote while being interviewed by IGN:
“We did have kind of a check-in process, where we would show them the footage and say, ‘What do you think? Is it good?’ At one point, [Nintendo] said, ‘Bowser’s much bigger than that. He’s way bigger than Zangief.’ We were like, ‘Okay, we’ll make him bigger. How’s that?’ They’d say, ‘Yes, that’s good — but he wouldn’t drink his coffee like that. He wouldn’t make that mouth.’ [Laughs] Of course, then people from Sega said, ‘Well, Doctor Robotnik is bigger.’ [Laughs] They wanted their characters bigger and bigger. We were going to end up with these giants in a room, with Ralph as this little guy… But I think that stuff really helped. I looked back on our original animation before the Nintendo notes, and it was like, ‘You know, he does look more like Bowser now.’”
You can read the full interview over at IGN, though this is the only SEGA mention.