Car

The Cars are reoccurring object in the Sonic the Hedgehog series that first appeared in Sonic Adventure. They are bypassing vehicles whose designs and purposes have varied thorough the series, usually as either obstacles or objects needed by the player.

Description
Cars has the same outfits of the cars from the real worlds and they usually have the 1980-2010 outfits. It's main objections varies between games as in some games it will hurt the player, sometimes can be used as vehicles, picking it as an object to throw and sometimes the player has to destroy or attacks them to complete a story or a town Mission.

Sonic Adventure
In Sonic Adventure, they are used for hurting the player in some levels like Speed Highway, making the player lose his rings. they also has a regular appearance in the Town Stages, however they will not hurt the player when touched by one of them and they will stop moving when the character is in front of them.

Sonic Adventure 2
In Sonic Adventure 2, it first appeared in City Escape where the player has to avoid being touched by them as they will descends his skating speed. Also in some missions the player has to avoid hurting the cars Like in the mission 3 of Route 280 as doing so will make the player restart the mission again. In this game, they will not hurt the player and they can be knocked away.

Shadow the Hedgehog
In Shadow the Hedgehog, they are one of the vehicles that can be used for fast travelling, however it has not ammo in it and they will be destroyed after taking much damages.

Sonic the Hedgehog (2006)
In Sonic the Hedgehog (2006), they can only be seen in Town Missions. They are either used in these towns to protect them, racing with or to attack them as some of them are recognized as Thieves' cars which the player has to destroy them making the red gauge above them depletes to zero to complete the town stage. In Sonic's case the player has to attack them with Sliding Attack, but in Shadow's case the player has to use his vehicles' weapons to attack. By using Shadow's wall glitch before entering Dusty Desert mirror on of Soleanna new city's door, the player can see a large amount of cars that it seems to be in an early development of Soleanna's new City, however these cars are seems to be not be customized as they clash on everything and they cannot hurt the player. Also the player can use the Psychokinesis to catch and throw destroyed cars.

Sonic Generations
In Sonic Generations, it returned it's main objections that were in Sonic Adventure, as they have also used to hurt the player in Speed Highway acts, but in City Escape, the player can destroy them to fill his Sonic's Boost Gauge. Also in Silver's rival boss, Silver will use some of the cars to attack Sonic which can be destroyed by Sonic's Boost, also the Battle's arena is filled with destroyed cars. It should also be noted that when Classic Sonic is in front of a car, the car will stop just Like Sonic Adventure.