Flatoculus

The Flatoculus is a species of eyebulb that hides in the ground, disguised as a rock, revealing itself when discovered.

=In fanon games=

In Pikmin: Decayed Leaf
The Flatoculus is a disguising enemy found in Pikmin: Decayed Leaf. The creature resembles an eyeball, specifically a large, somewhat flat eyeball on the ground. However, it disguises itself as a small, flat stone. If approached, it will reveal its true identity. It will then begin to glow a bright yellow for 3 seconds, before shooting out a ray of yellow light directly upwards. Up to 10 Pikmin caught in this ray can die, and no Pikmin is immune to its attack. However, it has a 5-second cooldown after shooting, during which it is completely helpless. It pops out of the ground when it dies, making it accessible to transport to the Onion or ship.