How do Nintendo hardware refreshes historically sit alongside new platform introductions?
gb - april 1989
gb pocket - july 1996
gb light - april 1998
gbc - october 1998
gba - march 2001
gba sp - february 2003
gba sp+ - september 2005
gb micro - september 2005
ds - november 2004
ds lite - march 2006
dsi - november 2008
dsi xl - november 2009
3ds - february 2011
3ds xl - july 2012
2ds - october 2013