Most turn blocks start to spin when hit. Other varieties will yield items such as a Feather or a Fire Flower, or simply give coins. Once this type of block has been hit enough times, it will turn into a Brown Used Block. There are also a few types of Turn Blocks that were programmed into SMW, but never used in any of the levels. One unused block will give no items, but instead become a Used Block when hit. Another unused turn will make Mario bounce off the sides, like a Note Block (this one is not recommended for use). One more type of unused turn block is always spinning and allows Mario to go through it like a dirt tile.
Standard Turn Blocks
- 11E = A regular Turn Block
- 117 = Turn Block with a Fire Flower inside, or a Mushroom if the player is small.
- 118 = Turn Block with a Feather inside, or a Mushroom if the player is small.
- 119 = Turn Block with a Star inside.
- 11A = Turn Block with a Star, 1-Up Mushroom, or Vine inside, depending on the X position.
- 11B = Turn Block with Multiple Coins inside. Amount of coins can be different depending on how fast you hit the block.
- 11C = Turn Block with a single coin inside.
- 11D = Turn Block with a Blue or Silver P-Switch inside, depending on the X position.
Unused Turn Blocks
- 048 = Always spinning Turn Block
- 129 = Turn Block that become a Used Block when hit, but gives nothing.
- 12A = Turn Block that acts like tiles 140, but yields a Feather when hit.
- 12B = Turn Block that you can bounce of the sides of.
- 140 = Turn Block that can't be destroyed.
- Turn blocks are one of the six kinds of blocks in Super Mario World that can be duplicated if hit by a carriable sprite at the right angle.
- The six bouncing blocks (turn blocks, ? blocks, translucent blocks, note blocks, ON/OFF switches, and green star blocks) have a set of four slots for their data, which is cycled through when any block is hit. Turn blocks also use these slots for their turning timers, so if the slots are cycled through when a turnblock is turning, that block will be reset and stop immediately.
- If the turn blocks with items in them have their slot replaced, it will not become a brown used block and instead remain a turn block, which can be hit again to get a second item from it. The same result happens with ? blocks and green star blocks.
- If Mario has a cape and is breaking through a large area of turn blocks (like in Star World 1) and moving left or right, Mario may begin flying downwards through the blocks at a high speed (this is due to the fact mentioned above). This is nicknamed the "smashola" glitch.