Power-Up Detectors

Overview
These input devices will detect if Mario has a power-up and will activate a p-switch accordingly. You can use the same idea used in these detectors to activate other inputs, like a pow block or on-off switch.

Star Detector
The Don't Touch the Star Contraption prevents the player from collecting a star. It is only possible to make this in Mario Maker 2. The Set-up is complicated compared to other contraptions and uses numerous poison mushrooms. Because of this, the night ground theme is necessary. One the left side of a see-saw platform, there is a muncher and a p-switch. On the right side, there are 10 stacked poison mushrooms and a muncher. When Mario collects a star the poison mushrooms run away, and the muncher on the left balances out and hits the p-switch. So, if Mario has a star, a p-switch activates.

Any Power-Up Detector
A Power-Up Detector checks if the player has a power-up when the contraption spawns. Note that this does not include a Yoshi nor star. (Use the star and Yoshi detectors for that.) In addition, the bomb takes a couple of seconds to explode so the detector is not instantaneous. The Set-up uses a progressive power-up that will move right if it spawns as a mushroom. In the note block is a muncher and there is a one-way facing right behind the power-up. The empty p-block is put into place so the power-up will not keep constantly bounce against the note block. So, if Mario has any power-up, a p-switch activates.

Yoshi Detector
A Yoshi Detector checks if the player is riding a Yoshi. Such an item is only available in smw and smbu so those are the only styles where this contraption functions. Once spawned the two Yoshi eggs will hatch and normally balance out the seesaw. However, if Mario is riding a Yoshi, one egg will not hatch and the muncher will weigh the seesaw down. So, if Mario has a Yoshi, a p-switch activates.