Checkpoint block

The Checkpoint Block is the block that Wario smashes in Wario Land: Shake It! to save his progress up to that point for that level. They almost always appear right before the imprisoned Merfle. They are very handy to whack, for should Wario either

A. Die or B.  Not make it back to the start of the level in time, he will reappear from the block to try again. Also, should Wario not collect enough coins or treasure to his liking, or should he take damage on the way back with a Merfle during a mission where he can not take damage, etc., he can reset from the start of that block at will. They are among the most useful items in the game, thusly, per haps one of the roughest dares the game makes is the mission to complete a stage without hitting it.