These are creatures that are an enemy you'd see in the Mushroom Kingdom combined with a cow to make a new variation of the species. These can all be found in the Dairy Kingdom.
“Moopers are cow/Blooper hybrids that exist along with Moop Moops in the Milky Strait. It can be...Moopers
“They are Shy Guy/Cow variations that should not be confused with Cow Guys. They typically just...Moo Guys
“These are a Koopa/cow hybrid that reside in the Dairy Kingdom. They look like normal Koopas...Moopa Troopas