A Super Thwomp is the larger version of the Thwomp. As the title implies, it is an enlarged version of the Thwomp; aside from that one difference, they are identical.
Super Thwomps make their debut in the game New Super Mario Bros, first appearing in World 4 Castle, seen smashing through stone blocks.
Super Thwomps appear again in the game New Super Mario Bros. Wii, only appearing in World 1-Castle, guarding the second Star Coin under a set of blocks.
A single Super Thwomp is seen in the center of the course Thwomp Desert as the only enemy.
Super Thwomps appear once more in the game Super Mario Maker as enemies. They can be created my dragging a Mushroom onto a Thwomp. They can smash through brick blocks, clouds, and stone blocks.
They appear twice in the Supermassive Galaxy of the game Super Mario Galaxy 2.