Important Thing!

Important Thing! is the twenty-first Trouble Center mission in Paper Mario: The Thousand-Year Door, initiated by Frankie. It is first available after clearing Chapter 5.

Mission
Mario must head to the west side of Rogueport to find Frankie next to a fountain. When talked to, Frankie tells Mario that he lost his Wedding Ring in Rogueport. To recover the Ring, Mario must head to the east side of the town and cross the stream near Garf's house with Mini-Yoshi. He must then return the Ring to Frankie, who rewards him with a Gold Card, and the trouble is solved.

In-game description

 * "I'm lookin' for somethin'. I can't say exactly what here, but I can tell you in person. I'm waitin' on da west side of Rogueport."