What is the name of that old computer game where Luigi goes around to different countries and answers stuff?

I remember playing this game all the time when I was younger, but I can't remember the name of it.What is the name of that old computer game where Luigi goes around to different countries and answers stuff?
It was called "Mario is Missing!"
yes!!!What is the name of that old computer game where Luigi goes around to different countries and answers stuff?
Super Mario? That's all I can remember that has the name 'Luigi' in it.
Luigi's big, gay adventure?What is the name of that old computer game where Luigi goes around to different countries and answers stuff?
Mario is Missing?
Is it called

"Mario %26amp; Luigi superstar saga"?
It's not Mario and Luigi superstar saga, I'll tell you that. That's a boring game on the GBA where you have a turn-by-turn based game with Mario and Luigi...