Wario's amiibo Sketch
From the Super Mario Wiki
Wario's amiibo Sketch is a souvenir in WarioWare Gold where the player can scan their amiibo for a random amount of coins. Upon scanning any amiibo, Wario will start drawing something (a character or a random painting depending on the amiibo) that can be sold. Normally, Wario's drawings will have a very poor quality unless the amiibo scanned is one about himself.
After scanning three amiibo, the player will not be allowed to do it again until the next day.