Spiked Goomba

In  Super Paper Mario, Spiked Goombas once again appear. They, as always, cannot be stomped by normal means. However, they can be defeated by using a Pixl, such as Boomer, Carrie, Barry, or Cudge. Bowser's fire breath attack can also toast them. They appear in the Flipside Pit of 100 Trials in rooms 12 and 38.

The spiky helmets they use (Or possible green spike top shells) appeared as an item in Paper Mario: Sticker Star for the Nintendo 3DS.

Tattle
It's a Spiked Goomba. Look at that spiky hat! Max HP: 1. Attack: 2. That spiky hat makes stomping on it a very bad idea... I recommend throwing something at it... Or you could just walk on by...

Catch Card Location
Brought from the Card Shop or used a Catch Card or a Catch Card SP.