Gaming Super Mario Odessey - "live" stickers/ collectables?

[BvanBart]

So I really don't know how to put this but hear me out:

When you enter the first world just before the platform were you will find your first moon.
There are 3 longer rocks on the right side. When I jumped there the old Mario with wings on his
had in pixel form jumped up and disappeared again 3/4 seconds later. I was trying to collect/ capture
it but I can not find it anywhere. Is this a spoiler/ easter egg of some kind? Or is it something I could have collected?

 

[BvanBart]

Ok IT was NOT the picture shown above. I Made a picture of it

 

[blinkzane]

It's just an Easter egg. Throw your cap at it.

 

[BvanBart]

Ok found them in 3 other worlds as well!

 

[Bladexdsl]

throw your cap at these you get coins and hearts.

 

[Frysenberg]

throw your cap at these you get coins and hearts.

Coins from Mario, hearts from Peach.

 

[Futurdreamz]

And moons from Luigi.