From the Super Mario Wiki, the Mario encyclopedia
Some are stationary and some jog in a set path, and they can be defeated by any attack except a jump. Spiny Skipsqueaks can also make a high hop. Spiny Skipsqueaks are found usually in groups of two or more. Spiny Skipsqueaks make their first appearance in the level Really Rolling Hills.
Additionally, Spiny Skipsqueaks appear as placeable enemies in Super Mario Maker 2 in the Super Mario 3D World style, where they jump whenever Mario jumps. Just like Skipsqueaks themselves however, if they are pushed away from its starting point, such as by a Thwomp or Track Block, it will run back towards its starting point and even Triple Jump over obstacles to get there. If it cannot pass the obstacle, it will give up and look tired, then reset its movement pattern from its new location.
Names in other languages