Spiny Cheep Cheep
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Spiny Cheep Cheeps (also formatted as Spiny Cheep-Cheeps or "Cheep-cheeps") are purple Cheep Cheeps with spikes running down their backs. They are fast swimmers and from New Super Mario Bros. Wii onward, they will chase Mario, like a Rip Van Fish.
Super Mario series
Super Mario Bros. 3
In Super Mario Bros. 3, Spiny Cheep Cheeps only appear in one level: World 7-4. They swim faster than normal Cheep Cheeps, though they can sometimes be seen swimming slowly as well. They also swim both left and right. They can be defeated using Hammer Mario's hammers, Fire Mario's fireballs, or by Invincible Mario.
New Super Mario Bros. Wii
Spiny Cheep Cheeps reappear in the Wii game New Super Mario Bros. Wii. They first appear in World 1-4 and later in world World 4-1 and World 4-4. A single Spiny Cheep Cheep also appears in a secret area in World 8-4. Once it catches sight of Mario, Luigi, or the Toads, it will hunt them down. Though small, the Spiny Cheep Cheep is quite fast and relentless in its chase; more so than the Deep Cheep. They can be frozen using Ice or Penguin Mario's ice balls, but like all spiked enemies in the game, they will not stay frozen for long. Once it unfreezes, it has an angrier look on its face, the same one a Deep Cheep has. This does not affect anything it does.
New Super Mario Bros. 2
Spiny Cheep Cheeps also appear in the Nintendo 3DS game New Super Mario Bros. 2, where they first appear early in World 1-5. They behave the same way and have the same appearance as in New Super Mario Bros. Wii, except they have an angry look on their faces.
New Super Mario Bros. U
Super Mario Land 2: 6 Golden Coins
The Spiny Cheep Cheep is a fairly rare enemy in Super Mario Land 2: 6 Golden Coins, and it appears only in the Turtle Zone. Unlike its other appearances, it is flat and slender, almost eel-like, but it regularly inflates itself into a spiked ball. When inflated it can only rise upwards, so it moves towards Mario when deflated and attempts to block his path by puffing up and getting in his way. Spiny Cheep Cheeps can be defeated with Fireballs.
Super Mario World television series
Spiny Cheep Cheeps (or possibly Porcupuffers) also appear in the Super Mario World television series in the "Fire Sale" episode. Yoshi refers to them as Porcupine Fish, as they pop out of the water and paralyze anyone who touches them. In the episode, Mario, Luigi, Princess Toadstool, and Kootie Pie are paralyzed by the Porcupine Fish.
Mario Pinball Land
In Mario Pinball Land, Spiny Cheep Cheeps (referred to as "little puffers" in Nintendo Power) assist Porcupuffer, the boss of the Frosty Frontier Stage. Rather than black or purple, these Spiny Cheep Cheeps have a red and white coloration, retain a dorsal fin akin to a regular Cheep Cheep, and have spikes around its body.
Yoshi Touch & Go
A very similar fish appears in Yoshi Touch & Go, as it is also blue and spiky; however, the fish enemy's spikes are white, and it is always leaping. They can only be defeated by smacking them with an egg. It is most likely a variant of Flopsy Fish or a Porcupuffer.
Mario & Luigi: Superstar Saga + Bowser's Minions
In Mario & Luigi: Superstar Saga + Bowser's Minions, Spiny Cheep Cheeps appear in Oho Ocean Seabed and replace both Cheep Cheeps and Puffer-Cheeps. However, they have identical behavior, first appearing as plain, purple Cheep Cheep and shedding its "mohawk" in favor of retractable spikes when stomped. Damaging it again reverts it into its previous form.
Names in other languages