Who said "A good friend knows when to laugh and when to be serious."?

This quote is attributed to Luigi.

A good friend knows when to laugh and when to be serious. - Luigi

"A good friend knows when to laugh and when to be serious."

Luigi Friendship

"It's-a me, Luigi!"

"Mamma mia!"

"Let's-a-go!"

"I'm-a scared, but I'm-a going anyway!"

"Friendship is built on trust and honesty."

"True friendship is worth more than gold."

"Good friends are like stars, always there even when you can't see them."

"Friendship means sacrifice."