The Item Wall Jump, or Item Wall Carry, is one of the basic tricks used in Super Mario Maker. This allows Mario carry an item while performing a Wall Jump.
The basic item wall carry is done by throwing the item off the wall and doing a wall jump to regrab it. This can done with Springs, P Switches or Bob-ombs.
This version of the item wall carry requires the player to drop the object instead of throwing it. This version is necessary for carrying shells, but can also be done with any of the previously mentioned items and can even sometimes be more benificial.
This version of the item wall carry requires the player drop the object and be facing away from the wall. This is only required for carrying a POW Block, but can also be done with any object.