NES - Tie between Zelda 1 & 2
Gameboy - Pokemon Silver
SNES - Cant really think of one, havent played many SNES games
Gameboy Color - Links Awakening DX
Virtual Boy - Shh, it never existed
N64 - Ocarina of Time
GBA - Pokemon Emerald
GC - Twilight Princess (never owned the Cube)
DS - Pokemon Diamond (Soul Silver but Silver was already listed so)
Wii - Smash Bros Brawl
3DS - Pokemon X
Wii U - New Super Mario Bros U (1 of the 2 games I own on WiiU, you can probably guess the other)

NES - Super Mario Bros. 3
Gameboy - Pokemon Blue
SNES - Super Mario World
Gameboy Color - The Legend of Zelda: Oracle of Seasons
N64 - Super Mario 64
GBA - Pokemon Gold
GC - The Legend of Zelda: Wind Waker
DS - Castlevania: Dawn of Sorrow
Wii - Mario Strikers Charged
3DS - Pokemon Y
Wii U - Super Mario 3D World

NES- zelda
SNES- super metroid
virtualboy- tennis
GB- pokemon red
GBA- never owned one
n64- goldeneye
gamecube- windwaker
wii- little king's story
wiiU-?
DS- ff tactics advance 2
3ds- animal crossing

NES- Super Mario Bros.

Gameboy- Super Mario Land 2

SNES- Super Mario World

Gameboy Color- N/A

Virtual Boy- N/A

N64- The Legend of Zelda: Majora's Mask

GBA- N/A

GCN: Paper Mario: The Thousand-Year Door

DS- Professor Layton and the Curious Village

Wii- Mario Kart Wii

3DS- Animal Crossing: New Leaf (so far)

Wii U- Super Mario 3D World (so far)

NES - Super Mario Bros. 3
SNES - Super Mario World
N64 - Super Mario 64
GCN - Mario Kart Double Dash
Wii - Mario Kart Wii
Wii U - ZombiU tied with Super Mario 3D World. Soon to be Mario Kart 8

GB - Pokemon Blue
GBC - Pokemon Gold
GBA - Dragon Ball Z: The Legacy of Goku
DS - Pokemon White
3DS - Pokemon Y