This character exists primarily or exclusively within the Sonic Boom continuity. Information in this article may not be canonical to the storyline of the games or any other Sonic continuity.

In Sonic Boom: Fire & Ice, a number of unnamed enemies appear in Cutthroat Cove.

Hover-based enemy[]

This unnamed enemy is a hover unit-based robot created by Dr. Eggman that floats in the air. It is mainly golden with a curved shell on its top, a tripod for legs, and a green eye with a slit-like pupil on it. It appears in Boneyard Hollow, Treetop Marsh, Cypress Cavern, Scallywag Reef, Buccaneer's Cove and Treasurer's Plunder. It is also encountered on Kodiak Frontier, Seaside Island, Paleo Tarpits and Cutthroat Cove.

In gameplay, this enemy slowly hovers around, patrolling its designated area. Upon seeing the playable character however, it starts shooting projectiles at them. Destroying it will award the player a Ragnium shard.

Beetle-based enemy[]

This unnamed enemy is a beetle-based robot created by Dr. Eggman that floats in the air. It possesses a purple color scheme with a gray lower rim around its dome-shaped body, a small head on the front with blank yellow eyes, two red spots behind its head, a helicopter rotor on top of its back, and four short gray legs with purple tips that holding a purple, two-barreled missile launcher. It appears in Cutthroat Swamp and Castaway Bay.

In gameplay, this enemy attacks the playable characters by firing partial homing missiles that move in the direction of the playable character. Destroying it will award the player a Ragnium shard.

Boar-based enemy[]

This unnamed enemy is a boar-based robot created by Dr. Eggman. It possesses a thick brown body with a purple stripe around its waist, a gray collar with a recess within it for its head, gray spikes on its back, a long pig snout, gray tusks, green eyes with slit-like pupils, four legs with purple and gray joints, and purple hooves. It appears in Cutthroat Swamp. It is also encountered in Gothic Gardens.

In gameplay, this enemy patrols its designated area. Upon detecting the playable character however, it starts charging towards them. Destroying it will award the player a Ragnium shard.

Jellyfish-based enemy[]

This unnamed enemy is a jellyfish-based robot created by Dr. Eggman that can float. It possesses an indigo color scheme with a cap for a head, a yellow eye with slit-like pupil on said cap, and six mechanical tentacles with purple tips. It appears in Boneyard Hollow, Scallywag Reef and Treasurer's Plunder.

In gameplay, this enemy patrols its designated area. Upon seeing the playable character however, it charges diagonally ahead and sticks into the ground, dealing damage when impacting the playable character. Destroying it will award the player a Ragnium shard.

Ostrich-based enemy[]

This unnamed enemy is an ostrich-based robot created by Dr. Eggman. It is mostly gray with yellow feet, teal details, a yellow beak and green eyes. It appears in Scallywag Reef and Castaway Bay. It is also encountered in Kodiak Frontier.

In gameplay, this enemy can fire large, partial homing projectile upon seeing the playable character. Destroying it will award the player a Ragnium shard.

Lizard-based enemy[]

This unnamed enemy is a lizard-based robot created by Dr. Eggman. It is mostly lime green in color with yellow frills down its face and spine, three-toed feet, and yellow eyes with black ripple patterns. It appears in Treetop Marsh and Treasurer's Plunder. It is also encountered on Seaside Island and Paleo Tarpits.

In gameplay, this enemy slowly patrols its designated area. Upon detecting the playable character however, it curls into a ball and charges towards its target, dealing damage upon impact. Destroying it will award the player a Ragnium shard.

Mole-based enemy[]

This unnamed enemy is a mole-based robot created by Dr. Eggman. It is a rather small robot with a yellow body, an orange head, a gray drill for a nose, and a pair of caterpillar tracks for feet. It appears in Castaway Bay.

In gameplay, this enemy only appears in the underground Burrow sections for Knuckles. Initially, it will remain idle until it detects Knuckles. When it does, it will start pursuing him at medium-speeds. The only lay to defeat this enemy is by trapping it inside a Burrow Loop. Destroying it will award the player a Ragnium shard.