>>11972352
It was all part of Shitoru Shitwata's master plan to memory-hole old (GCN/GBA and earlier) Nintendo and replace it with Nutendo (DS/Wii "blue ocean strategy" casual-pandering) ASAP.
Same reason why he delayed Twilight Princess for a year to add waggleshit and make it a Wii launch title, even though it was perfectly ready to release on GameCube in 2005.