If you're specifically looking for a WBFS file of WarioWare: Smooth Moves, I recommend checking out forums or sites dedicated to Wii homebrew and game backups, but ensure you understand the legal implications and risks involved.
WarioWare: Smooth Moves is a party game developed by Intelligent Systems and published by Nintendo for the Wii console. The game is part of the WarioWare series and features a collection of mini-games that utilize the Wii Remote's motion controls. Players use the Wii Remote to perform various actions, such as shaking, swinging, and tilting, to complete challenges and progress through the game. warioware smooth moves wii wbfs link
Create a folder named wbfs on the root of your USB drive or SD card. If you're specifically looking for a WBFS file