Loulou is a female Dachshund, she wears a pink polka-dot ribbon and is black and tan.
Her owner, Joe/Bob, gives out advice for training your dog. Loulou gets along well with other dogs on walks, if the other puppy is not famished, hungry, parched, thirsty, dirty or filthy.
- Aster, another Dachshund who appeared in the original Nintendogs game, had the same personality as Loulou.
- Loulou never appeared in the original Nintendogs game for DS