Rolling Toy Block
From the Super Mario Wiki
The Rolling Toy Block is an object that can be found in the Game Boy Advance game Wario Land 4. The Rolling Toy Block is a mobile platform type item that Wario can ram in to move along to an area where he can stand on top of it, in a similar fashion as the Chomp Rocks from the Yoshi franchise, in order to reach otherwise inaccessible places to grab coins or Diamonds. The Rolling Toy Block is a circular shaped block that is red with stripes. The only stage that Rolling Toy Blocks can be found on is Toy Block Tower, in the Topaz Passage.