Now that Nintendo has a higher market value than Sony, they also can afford A-List Hollywood stars to make advertising for them.

Nintendo signed no other than Nicole Kidman to promote Nintendo’s Brain Training series across Europe. The new More Brain Training from Dr Kawashima: How Old is Your Brain will be released on June 29th. (pre-order in UK).
Ms. Kidman comments: "I love the concept that Nintendo is reaching out to new audiences with their self improvement products like Brain Training. Most importantly, I’ve quickly found that training my brain is a great way to keep my mind feeling young."

Nintendo chose Nicole Kidman because of her universal appeal to mainstream audiences of all ages and backgrounds, as well as her reputation for being intelligent, entertaining and genuine.

In the adverts, fans will see Nicole Kidman as they’ve never seen her before says Nintendo. We are supposed to see Nicole in a home setting, relaxing and training her brain. She is seen speaking into the Nintendo DS to complete the exercises and memorizing numbers.
Via the Nintendo Europe site.