Prickly Goombas first appear in New Super Mario Bros. Wii, where they are encountered only in World 9-7. The players will sustain damage if they jump on their spiked shells. Prickly Goombas will remain stationary until their shells are burned open with a single fireball, thus reverting them to regular Goombas. They can also be frozen by ice balls.
New Super Mario Bros. U / New Super Luigi U / New Super Mario Bros. U Deluxe[edit]
Prickly Goombas are quite similar to Pestnuts from Mario & Luigi: Superstar Saga, in that they are both chestnut-themed enemies that hold a certain enemy within them (Goombas and Beanies, respectively) that act their usual manner when released.