1) Crono Trigger**
2) Mario Kart DS
3) Pokemon any one of these (Platinum, Heart Gold or Black)
4) Animal Crossing: Wild World (was lucky enough to get some nintendo furniture for my house)
5) Advance Wars Dual Strike (DoR was kind of bleh for me)
**Honorable Mention (and possibly my official number 1 if only it were NTSC localized): Super Robot Wars Taisen W. Despite lack of Japanese language skills and only learning from tutorials on youtube in confirming actions. You had all the greatest modern robos from the 80s to early 2000s. Gundam Wing, Voltron and the original SRWW bots themselves are all greatly designed.
(Just started playing Shadow Dragon, haven't gotten far enough whether the remake is worth top five of my all time despite enjoying Fire Emblem overall as a franchise).