A pack with some very customisable question mark blocks including a power up dependant block (similar how the flower and feather ?-blocks from the original game act like), a block to spawn enemy sprites, Yoshi eggs, place an item to the item box, giant versions of them and a giant coin block.
You can change the sprite (obviously), the initial sprite state (for carryable and some other sprites), the power up out of block/ stun/ random sprite timer (depending on the sprite), the sound effect, some bounce block settings including properties too and even whether the block is dependand from the item memory or not (requires the included object).
Be aware that due to unoptimised routines (not my fault, really), the giant blocks can cause black lines on top of the screen or glitch the HDMA for one frame.
Read the readme for more information.
Also thanks for LX5 for two routines and the Yoshi egg blocks.
NEW Includes blocks to place an item box item! NEW The block can now change to any tile as opposide to these which SMW only can turn into (requires Custom Bounce Blocks)!
They seem to work. That took a lot of time to test, but I didn't find any issues except for some blocks in the examples folder using %move_spawn_relative_to_block instead of the correct %move_spawn_relative. Also a typo in your block list, it said 30V instead if 30B. I corrected both in the submission.