Oomp belongs to the Boomps, a clan of shapeshifting goblins thriving in Nightmare Land. Unlike many inhabitants, they remain notably resistant to the Nightmare King’s corruption, actively aiding heroes like Nemo and his companions during their mission to rescue King Morpheus. The Boomps first intervene after the Nightmare King’s forces capture Nemo’s allies, offering guidance and strategic support throughout the perilous journey. Their talents include morphing into diverse forms—though the exact nature of these shifts remains unspecified—alongside unwavering loyalty and cunning ingenuity. They navigate Nemo through hazardous terrain and provide vital assistance during clashes with adversaries. A unique vulnerability emerges when exposed to high-pitched noises, such as the piercing calls of Nemo’s companion Icarus, which visibly unsettle them. After briefly parting ways, the Boomps reconnect with Oompo, a missing member who bears a pivotal message from the captive King Morpheus. This revelation includes the secret incantation required to awaken the royal scepter’s power, empowering Nemo to challenge the Nightmare King. In the climactic battle, the Boomps fight alongside Nemo, their efforts instrumental in overthrowing the tyrant and freeing Slumberland. Their origins and deeper motivations remain shrouded, defined solely by their defiance of the Nightmare King. Their narrative arc centers exclusively on this alliance, with no expanded presence beyond their pivotal role in this central conflict.