The Sea Fox is a sleek miniature submarine with a blue and orange color scheme. It features a foreplane with a resilient and aquadynamic glass visor on the front and, two smaller engines on the sides of the back rear. It moves predominantly using screw propulsion via a propeller on its rear that strongly resembles Tails' twin-tails. Its also has a flat nose for a headlight to illuminate the deep sea.
In gameplay, the Sea Fox is deployed into yellow and blue water pipes marked with the Sea Fox. While underwater, it can use a sonar to briefly show a map of the current undersea section points of interest highlighted. It can also use missiles to clear obstacles. However, the Sea Fox only lasts for a short time before its energy gauge in the top right corner of the screen runs out, and taking damage drains it faster. However, its time limit can be increased by collecting watches. If the time runs out, the player returns to dry land and takes damage.
Sonic Boom: Shattered Crystal
The Sea Fox first appeared in Sonic Boom: Shattered Crystal. In this game, its main purpose is to find hidden Blueprints in the underwater section. These underwater sections are rather simple in design, having completely black walls and a one-shaded background in a certain color that darkens as the player goes deeper. Each section has one collectible to find.
When using the Sea Fox's sonar in this game, a basic outline of the current undersea section is shown on the lower screen of the Nintendo 3DS. Red triangles mark mines while green rhombuses mark the exit and collectibles.
In gameplay, the Sea Fox can be deployed by Tails into pipes inside the adventure levels by pressing . Once inside, the player enters a underwater section where they take control of the Sea Fox. To fire the Sea Fox's missiles, press , and to use its sonar, tap the touchscreen on the Nintendo 3DS. Once inside a underwater section, the Sea Fox can manually exit it by entering a pipe found within said section.
Outside the main gameplay, the twenty-eight toy the player obtains will be a model of the Sea Fox
Sonic Boom: Fire & Ice
In Sonic Boom: Fire & Ice, the Sea Fox reprises its role from Sonic Boom: Shattered Crystal, where it is used to obtain hidden Trading Card(s) in underwater areas. This time around, the underwater sections have much richer environments, featuring cavern shadings, coral and undersea flora.
When using the Sea Fox's sonar in this game, a detailed outline of the current undersea section is shown on the lower screen of the Nintendo 3DS. Along with the highlights it used in the previous title, the sonar also marks breakable obstacles as transparent frames and watches as purple dots.
In gameplay, the Sea Fox can be deployed into independent levels on the World Maps, meaning the player will directly enter a underwater section from a World Map. To fire the Sea Fox's missiles, press , and to use its sonar, tap the touchscreen on the Nintendo 3DS. Once the Sea Fox obtains all Trading Cards in an undersea section, it automatically exits it. Clearing a Sea Fox level fast enough will award extra Ragnium.
|Darkened Depths||Sunken Caverns||Narrow Fathoms||Underground Tides||Aquatic Plunge||Deep Sea Dive|
|Clear level in 00:40 min||Clear level in 00:40 min||Clear level in 01:10 min||Clear level in 00:55 min||Clear level in 01:10 min||Clear level in 01:10 min||Ragnium|
- Like its main series counterpart, the Sea Fox is only used on handheld systems.
- Both games in which the original Sea Fox appeared in are playable on the Nintendo 3DS, the same system as the game this version appears in.