Axon Klaxon is a Brick Vendor NPC in the Assembly Storeroom in Nexus Tower. Like Bruno Underbite, Axon Klaxon sells primarily basic bricks, but he also notably sells a Dish 6x6 Inverted Brick. This specific brick is needed by Doctor Overbuild to complete his Property Scanner by mirroring the dorsal inverse retro-encabulator. If players do not already have a Dish 6x6 Inverted Brick, Overbuild sends them to purchase one from Axon Klaxon. Axon's inventory is that of both Bruno Underbite and Darby Snapwish.