DS was obviously 2005. Just look at all these great games... 

 

DS Mario Kart DS
Nintendo, 2005
91.43%
74 Reviews
DS Castlevania: Dawn of Sorrow
Konami, 2005
90.35%
71 Reviews
DS Advance Wars: Dual Strike
Intelligent Systems/Nintendo, 2005
90.28%
61 Reviews
DS Meteos
Q Entertainment/Bandai, 2005
88.13%
63 Reviews
DS Kirby: Canvas Curse
HAL Labs/Nintendo, 2005
87.34%
61 Reviews
DS Animal Crossing: Wild World
Nintendo, 2005
86.27%
66 Reviews
DS Mario & Luigi: Partners in Time
Alphadream Corporation/Nintendo, 2005
85.23%
55 Reviews
DS Nintendogs: Lab & Friends
Nintendo, 2005
85.05%
76 Reviews
DS Nintendogs: Dachshund & Friends
Nintendo, 2005
85.01%
75 Reviews
DS Nintendogs: Chihuahua & Friends
Nintendo, 2005
85.01%
75 Reviews
DS Tony Hawk's American Sk8land
Vicarious Visions/Activision, 2005
84.46%
39 Reviews
DS Sonic Rush
Dimps Corporation/Sega, 2005
83.23%
55 Reviews
DS Phoenix Wright: Ace Attorney
Capcom, 2005
82.42%
64 Reviews
DS WarioWare: Touched!
Intelligent Systems/Nintendo, 2005
81.83%
63 Reviews
DS Trauma Center: Under the Knife
ITL/Atlus, 2005
80.30%
60 Reviews
DS Metroid Prime Pinball
Fuse Games Limited/Nintendo, 2005
80.22%
57 Reviews

Dual Strike, Animal Crossing, Mario Kart, and Dawn of Sorrow were some of the best games on the system IMO. 

As for 3DS...

3DS Fire Emblem: Awakening
Intelligent Systems/Nintendo, 2013
92.52%
52 Reviews
3DS The Legend of Zelda: A Link Between Worlds
Nintendo, 2013
90.55%
55 Reviews
3DS Pokemon Y
Game Freak/Nintendo, 2013
87.89%
45 Reviews
3DS Pokemon X
Game Freak/Nintendo, 2013
87.26%
45 Reviews
3DS Animal Crossing: New Leaf
Nintendo, 2013
86.93%
45 Reviews
3DS Luigi's Mansion: Dark Moon
Next Level Games/Nintendo, 2013
85.86%
44 Reviews
3DS Etrian Odyssey IV: Legends of the Titan
Atlus, 2013
85.00%
34 Reviews
3DS Shin Megami Tensei IV
Atlus, 2013
84.03%
37 Reviews
3DS Donkey Kong Country Returns 3D
Monster Games Inc./Nintendo, 2013
83.51%
41 Reviews
3DS SteamWorld Dig
Image & Form, 2013
83.05%
20 Reviews
3DS Gunman Clive
Horberg Productions, 2013
82.91%
11 Reviews
3DS Phoenix Wright: Ace Attorney - Dual Destinies
Capcom, 2013
82.43%
44 Reviews
3DS Etrian Odyssey Untold: The Millennium Girl
Atlus, 2013
81.39%
31 Reviews
3DS Mario & Luigi: Dream Team
Alphadream Corporation/Nintendo, 2013
80.65%
46 Reviews
3DS Monster Hunter 3 Ultimate
Capcom, 2013
80.13%

Best Fire Emblem game ever, best Animal Crossing, best 2D Zelda ever, and Poke'mon finally went 3D. Oh, and Etrian Odysey 4 is one of the best RPGs I've ever played. 



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