Level 4 is the fourth main level featured in Mini Mario & Friends: amiibo Challenge. This level introduces the concept of Yellow Springs as well as spikes and Piranha Plants. Any of the Minis can be used in this level.
The regular goal door is located in the top right corner of the level. In order to reach it, the player must make sure every Yellow Spring is activated by tapping on them, except for the one seen on a small girder in the middle of the stage. If done correctly, the Mini should automatically make it to the goal door.
The amiibo Door is located on the right middle side being blocked off by a Piranha Plant. To get to it, the player must scan a compatible Yoshi amiibo in order to play as Mini Yoshi. The player must follow the same path as the normal goal door, except the last two Yellow Springs must be deactivated. Once Mini Yoshi reaches said point, he will eat the two Piranha Plants blocking the way and will enter the door.
The first amiibo Token must be obtained using Mini Bowser Jr. and his Spike Guard ability. It is found above a set of spikes on the left side of the level, near where the Mini starts. The player must activate the first three Yellow Springs to make Mini Bowser Jr. fall into it, who will use his special ability to protect himself from the spikes.
The second amiibo Token must be obtained using Mini Luigi and his High Jump ability. It is found on a small ledge on the top left corner of the level. The player must follow the same route as the normal goal door, but the player must set up the last two Yellow Springs so that Mini Luigi will backtrack and High Jump onto the ledge containing the amiibo Token.