Spiny Cheep-Cheeps are enemies in New Super Mario Bros. Wii. They ae sub-species of Cheep-Cheeps. They are small purple Cheep-Cheeps with spikes on their backs. However, this isn't much of a threat because the player can't jump on enemies underwater anyway. Spiny Cheep-Cheeps, when the player gets near, chase the player until he gets far enough away. Though they are small, they are fast for their size, faster than a Deep-Cheep. It can be defeated by a Fireball or Starman. It can also be frozen, but like other spiked enemies, they don't stay frozen for long. Coming in contact with these dangerous enemies will make the player lose a form or die if at small form. Spiny Cheep-Cheeps first appear in World 1-4, however, they later appear in World 4-1, World 4-4, and in a secret area in World 8-4.
- When a Spiny Cheep-Cheep is frozen in NSMB Wii, and it unfreezes, it will have an angrier look. However, this does not affect the way the enemy performs.