Hardcore:

SMG

LoZ:TP

MP3

SSBB

RE4

Mario Kart

No More Heroes


Casual:

Wii Fit

Wii Sports

GH3

Hardcore

1. Twilight Princess
2. Metroid Prime Corruption
3. Mario Galaxy
4. Okami
5. No More Heroes
6. Fire Emblem Radiant Dawn
7. Fatal Frame: Mask of the Lunar Eclipse

Casual

1. Mario Kart Wii
2. Wii Fit
3. Boom Blox 

Question I always thought Mario Kart wsa hardcore? I mean can casual users get Triple * on every track? or unlock staff ghosts on time trials?


Hardcore
Metroid Prime 3: Corruption
Legend Of Zelda: Twilight Princess
Super Smash Brothers Brawl
Mario Kart Wii
Mario Galaxy
Fire Emblem: Radiant Dawn
Okami


Casual
Wii Fit
Mario Party 8
WarioWare: Smooth Moves

If you played MarioKart Wii than no. Plus alot of people I know dont play games at all but they love MarioKart. So you I say its pretty casual.
Not only that but when I was at best buy the other day I saw girl no older than 10 playing it with her mom all excited in back of her trying to play too.
So yea its pretty casual.

I happen to own 10 games, 7 core 3 casual

*Super Mario Galaxy
Legend of Zelda - TP
Smash Bros Brawl
Red Steel (Don't buy it unless it's cheap)
Resident Evil 4
Metroid Prime 3
*Mario Kart

*Wii Sports
*Wii Play
*Kororinpa

With asterisks are the ones that will probably appeal to your girlfriend