Yanrima~
"Laughter is the best medicine."
Yanrima~'s Creature:
I've always thought it was due to the age rating restrictions because of how rated T and rated M games still have mini games that resembles poker or other gambling themed content in the game.The Game Corner was removed not by choice but by legal regulations on the depiction of gambling in games, so that wasn’t really Game Freak’s decision.
The sprite art was better, though.
Still, I do remember that the international version of hgss has the game corner replaced with Voltorb flip.