This page explains how to solve the quest "Just Say NO" in Yo-kai Watch.
Start the Quest
Go to Everymart Downtown in Downtown Springdale and talk to someone inside to start the quest.
Time for Yo-kai power!
If you don't have a Noway medal, search in the grass in Uptown Springdale for a Rank E Yo-kai to find Noway. Its favorite food is Ramen.
After you have a Noway medal, go to Everymart Downtown and talk to the boy.
Let's go to Arcadia Arcade!
Go to the arcade in Downtown Springdale to complete the quest.
Return to the List of Quests.