Pink Spikes

"Change forms with a Pink Wisp for the wall and ceilling-running Spike form!"

- Tails in the Wii version of Sonic Colors.

The Pink Spikes (ピンク・スパイク), also known as the Spike form, is a transformation used by Sonic the Hedgehog in the Wii version of Sonic Colors, and by Classic Sonic in the console version of Sonic Generations. It is the Color Power Sonic gains when absorbing a Pink Wisp and its Hyper-go-on. While in this form, Sonic can turn himself into an extremely spiky ball.

Physical Appearance
As the Pink Spikes, Sonic's entire body turns into a large version of his own head, which is not much larger than Sonic's full height, that is covered entirely in hot pink skin. However, the version of Sonic's head that he turns into has nearly no facial features, such as Sonic's muzzle, ears or nose, except for his eyes, which have lost their pupils and have turned yellow. Also, on the back of the Pink Spikes, Sonic's quills have become several pointy and long spikes that extends outward, and he has three additional spikes arranged in a vertical line on his forehead.

Powers and Abilities
As the Pink Spikes, Sonic gains extra long, razor-sharp and extremely durable spikes on his entire body that can seemingly penetrate any surface and destroy reinforced crates that even Sonic cannot destroy on his own. By inserting these spikes into a surface while rolling as the Pink Spikes, Sonic can stick perfectly firm to any surface, allowing him to climb up walls and stick to ceilings by rolling, as if he was positioned on the ground.

Additionally, the spikes on the Pink Spikes also be used offensively by using them to pierce enemies. This allows Sonic to deals heavy damage to any of Eggman's robots by simply making contact with them, and to use an augmented version of his Spin Dash that is much more powerful than normal due to this form's spikes.

The Pink Spikes's weakness is that this form can only be maintained for a short time, before Sonic will revert back to normal, and requires more Hyper-go-on from Pink Wisps to be maintained.

Sonic Colors
In the Wii version of Sonic Colors, the Pink Spikes can first be used in Planet Wisp Act 1. The player can only use the Pink Spikes while Sonic is in possession of a Pink Wisp. The Pink Spikes can only be activated in the 2D side-scrolling sections of the Acts, as entering 3D sections with a Pink Wisp will cause the Pink Wisp to go dormant. Transforming into the Pink Spikes will cause the Wisp Gauge to start depleting, and once it runs out, Sonic will revert back to normal.

Unlike the other Wisps, where Sonic's normal moves are disabled while using a Color Power, Sonic can still double-jump and use his Homing Attack when transformed into the Pink Spikes. Also, when making physical contact with an enemy, the Pink Spikes will instantly deal damage to the enemy, without any side effects. After utilizing a Pink Spikes transformation for a few moments, the player will be awarded with 3,500 Color Bonus points for each second where the Pink Spikes is active.

Once the Pink Spikes makes contact with a surface, the player will automatically stick to the said surface. To get off a surface, the player simply has to jump off and steer away from the surface. Rotating bumper-like obstacle, however, can instantly knock the player off a surface, should the Pink Spikes make contact with it.

While as the Pink Spikes, the player is invulnerable to damage, be it from the environment or enemies. This means that the player cannot lose Rings or Lives due to taking damage when as the Pink Spikes, allowing the player to move over obstacles such as spikes as the Pink Spikes, without taking damage. The player can, however, still lose a life when falling into bottomless pits.

When accelerating with the Pink Spikes, the player can hold down the trigger button to build up a Spin Charge for more momentum on the Spin Dash. Doing so, however, causes the Wisp Gauge to be drained at a much faster rate.

Combined Form
In the 2 Player mode in the Wii version of Sonic Colors in Eggman's Sonic Simulator, two players are able to combine the Pink Spikes transformation with another Pink Spikes, by activating the two Pink Spikes at the same time when they are within a certain distance, to create a new Color Power. When activating the two Pink Spikes transformations at the same time, it creates a connecting line between the two player which can be used it to knockout enemies when they come in contact with the line.

Sonic Generations
In the console version of Sonic Generations, only Classic Sonic can transform into the Pink Spikes, as only his stage has Pink Wisps in it. It first appears in Planet Wisp Act 1. The player can only use the Pink Spikes while Classic Sonic is in possession of a Pink Wisp. In this game, the Pink Spikes retains many of the same properties it had in Sonic Colors, such as automatically sticking to surfaces and requires a jump to get off, and dealing damage to enemies upon physical contact. As an exclusive gimmick for the Pink Spikes in Sonic Generations, Classic Sonic can use the Pink Spikes to move gears, by rolling as the Pink Spikes on top of it, to open gates and alternate paths.

Because the Wisp Gauge is not present in this game, the Pink Spikes does not have an energy gauge to maintain it, and has instead a set time limit on fifteen seconds before Classic Sonic reverts back to normal, meaning actions such as the Spin Dash will not limit the duration of the Pink Spikes. The form's duration can be extended, however, by collecting more Pink Wisps.

While the player can in this game still move over spikes without taking damage and cannot lose a life due to damage like in Sonic Colors, the Pink Spikes can in this game lose Rings when the player is hit by attacks from enemies or when touching more hostile obstacles, such as bombs or buzzsaws, though the player will still not lose a life when taking damage while having no Rings.

To activate the Pink Spikes, the player has to press the triangle/Y button. To control the Pink Spikes movements, the player has to use the control stick, and to perform the Spin Dash, the player has to hold down the square/X button.

Trivia

 * The Pink Spikes can be used to deal extra damage in the Refreshinator battle.
 * It is debated whether the Pink Spikes reinforces Sonic's spines or grows new ones.
 * The Pink Spike's jingle is similar to that of the DS-exclusive Red Burst.
 * The way the player controls the Pink Spikes is similar to the control of Samus' Morph Ball in the Metroid series. It works like the Spider Ball, in which Samus can stick to the wall.
 * The introduction of the Pink Spikes marks the first time since Sonic the Hedgehog (2006) that Sonic can perform the Spin Dash offensively in the main series of the Sonic the Hedgehog series.