Block Sensor

Block Sensor is a rare item in Mario Party DS. It resembles a satellite dish. It allows players to detect hidden coin blocks that are scattered across the board. When used, the player is alerted that there is a hidden block detected. After the player rolls a standard Dice Block, he or she is awarded with a hidden block on the space the player landed on, and the effects of the space occur and game proceeds from there.

Obtained by

 * Grab Bag
 * Buying at an Item Shop.