Its A Block From Super Mario Land 2. It Shatters When Shot By A Fireball. Credit Is Not Needed.
This block is already included in the Shatter On ... Pack. If you wish, you may submit the SML2 graphics separately to the Graphics section.
Also, as per block submission guideline 6, blocks made with blockreator must be optimized. This block could use one less RTL if the labels are arranged so the Fireball label is at the top, and the block can use the db $42 header instead of db $37 to save space, since wallrunning code isn't executed (the WallFeet/WallBody labels and their JMPs can be removed too).