The Inspiration Signal is a treasure found in Hey! Pikmin. It is actually a light bulb.
Collecting the treasure
Hey! Pikmin logs
“My son was drawing pictures of me, but after he finished each one, he would crumple it up and throw it away. I thought they were very well done, but he never seemed satisfied. All at once, his eyes lit up, and he drew one with a bushy mop of hair on the top of my head. It wasn't accurate, but he seemed to like it better. Truth to tell, so did I.”
Names in other languages