GBA had a pretty great lineup IMO. I mean, there's a lot of ports on there, enhanced or otherwise, but at least they played them to their strengths (and continued to do so throughout the handhelds life).
Castlevania: Circle of the Moon was a fantastic game though. It's great to see a launch title that was still a must have throughout the handheld's life.
When I bought the game from Best Buy I found that someone switched the cartridge out of the box for two Taco Bell mild sauce packets lol. I had to go back and get another one. 
EDIT: 3DS' lineup is still solid though. I think Nintendogs, PilotWings, and SSFIV will be memorable titles throughout the 3DS' career.








