Siliconera writes: "If there's two divisions I absolutely adore at Nintendo, it's SPD3 and Retro Studios. Both are extremely talented at what they do, and both are among the few Nintendo divisions that aren't as restricted by what Miyamoto thinks is or isn't cool / acceptable in a game.
Retro have worked on Metroid Prime as everyone knows. SPD3 are in charge of overseeing the majority of the company's overseas or external projects. The group is credited with overseeing games like Punch-out!!, Excitebots, Batallion Wars and others. The head of SPD3, Kensuke Tanabe, is also credited as Producer on the Metroid Prime games."