Robot Scraps are collectable items in Sonic Boom: Rise of Lyric.
As its name implies, Robot Scraps are multiple small scraps of destroyed robot parts, namely from the Destruction Troops.
Robot Scrap is obtained by attacking/destroying Destruction Troops or from opening Robot Scrap Chests. In either case, when released, the Robot Scraps will be attracted towards the player for storage. However, if the player takes damage with no Rings in their possession or falls into a bottomless pit, they will lose some of their Robot Scraps upon re-spawning.
Robot Scraps serve as currency which can be used to purchase Team Upgrades in the Team Upgrade stores at Cliff's Excavation Site and Bygone Island. They are also used to repair parts of the aforementioned levels, allowing access to new areas.