Simplify the following text for a Grade 12 native English-speaking person.
Original: Developed by Nintendo for the Nintendo DS handheld game console , it was released worldwide throughout December 2009 after Nintendo president Satoru Iwata announced the game at the 2009 Game Developers Conference .
Simplified: Made by Nintendo for the Nintendo DS , it was released December 2009 after Nintendo president Satoru Iwata announced the game at the 2009 Game Developers Conference .