Famicom Tantei Club 2
From the Super Mario Wiki
Famicom Tantei Club 2 (ファミコンたんていクラブ2, lit. "Famicom Detective Club 2") is a microgame found in the Japanese version of WarioWare: Touched! in the Retro Action stage. It is based on the Family Computer Disk System game Famicom Tantei Club Part II: Ushiro ni Tatsu Shōjo. In localized versions of WarioWare: Touched!, it is replaced by the microgame Metroid, which features completely different gameplay.
Both the top screen and the touch screen show a picture. They are identical at first glance, but the picture on the touch screen includes a difference. The player has to find and tap the difference.