 New enemies were included to add diversity to the game, along with variants of previous enemies, such as Goombas, Hammer Bros., and Koopa Troopas.Some of the enemies designed for "Super Mario Bros. 3" were inspired by the team's personal experiences.For example, Miyamoto stated that the Chain Chomp enemy, a tethered ball and chain creature that lunges at the player when in close proximity, was based on a "bad [childhood] experience" he had with a dog.