From Bulbapedia, the community-driven Pokémon encyclopedia.
Jamero (Japanese: ジャメカくん Jameka-kun) is a floating, mechanical surveillance device used by Palace Maven Spenser and a character of the day that appeared in Ka Boom with a View!.
Jamero is a synthetic Gym assistant used to judge Spenser and Ash's battle over an area that encompassed an entire section of land with various environmental terrains and obstacles. Scott described its abilities as being able to hit high speeds in the air or underwater, and is capable of making decisions in less than a split second. Also, what Jamero views is fed back through a laptop, which was in the balloon that Scott and his friends were riding in during the match. It declared Ash the winner when Sceptile defeated Spenser's Claydol.