Chasing Koopa Shells are special Koopa Troopa shells that chase after Mario when a Beach Koopa crawls into one. They can also be called Kamikaze Koopas. Chasing Koopa Shells cannot stop moving when Mario stomps them, but can be eaten by Yoshi. Once eaten, Yoshi has all the abilities of the Red, Blue, and Yellow Yoshis(or all/any of the other Yoshi species, depending on the game). Chasing Koopa Shells are also created when a Koopa Troopa enters a Yellow Shell.