The Spina (スピナ), or Spinner, is a recurring badnik in the series that first appears in Sonic Adventure. In the North American and European releases of Sonic Adventure, it is called a Bladed Spinner in the manual.
The Spina is a bat-like badnik with blade wings attached to its midsection. These blades never stop spinning. Individual Spina have different behaviors to one another: some will hover in place, others fly around in circles or eights, and there are those who will move towards the enemy once they spot him/her. They are generally very common badniks that serve as Homing Attack stepping stones in a number of situations. There is also an advanced model known as the Spana, a Spina which discharges an electric field every now and then. In Sonic Adventure, they can be found in the following stages:
|Sonic||Casinopolis, Speed Highway, Red Mountain, Sky Deck|
|Tails||Casinopolis, Sky Deck, Speed Highway|
|Knuckles||Speed Highway, Casinopolis, Red Mountain, Sky Deck|
The Spina would then make a 2D appearance in Sonic Advance 2, where it hovers about in various places in Egg Utopia. It also appears in Sonic Advance 3, where it can be found in Route 99, Ocean Base and Chaos Angel.
Several years after its last 3D appearance, the Spina returns in Sonic Unleashed where it is simply known as a Spinner, with a new design sporting cone-shaped ears, cyan eyes and teeth. In Sonic Colors, the Badnik was redesigned again, now looking like a hybrid of both the Adventure and Unleashed designs.
It returns in Sonic Generations, appearing in Speed Highway, Seaside Hill and Rooftop Run in the HD versions, and appearing only in Tropical Resort in the 3DS version. They retain the same function and design from Sonic Colors.
In the 3DS version of Sonic Lost World, Spinas can be found in Windy Hill and Desert Ruins, once again serving as Homing Attack stepping stones that Sonic can use. Their design in this game is based off the Sonic Unleashed design, but with a cartoony look.
They have also appeared in Sonic Jump (2012) and Sonic Jump Fever as obstacles. Like all badniks in the game, they must be jumped into from underneath in order to destroy them. They can be found in Blue Sky Zone.
In Sonic Runners, Spinners were common obstacles, primarily in Windy Hill. They would either remain stationary or fly back and forth, and were placed either separately or in groups. Unlike other games, the spinning blades wouldn't regularly harm the player. There were also Golden Spinners that would award more points, and Super Spinners that could only be destroyed by Power Type characters or Color Powers.
Story Screen Scripts:
|Sonic Advance 2|
|Sonic Advance 3|
|Sonic Colours (Wii)|