? Switch Panel
From the Super Mario Wiki
? Switch Panels are objects that are found in Yoshi's Story.
? Switch Panels give more time to a ? Switch Event when a Yoshi presses the ? Switch by Jumping on it. To trigger the ? Switch Panel, the Yoshi can simply use the Yoshi Egg to filp the panel to give more time on the ? Switch event. There are many of them in some levels. They also actually act like ? Switches, like when the Yoshi attempts to flip the panel to start the event when the panel is hit as it flips. Like the ? Switch, the panel will start the start if it is flipped by the Yoshi Egg. The event starts when the part of the level is changed as the Yoshi attempts to look around the area as the music starts. When the music goes fast-paced, the Yoshi hasn't much time on the event unless the Yoshi flips the ? Switch Panel with the Yoshi Egg.