Cage (metal bar container)

Cages (ケージ Kēji?) are a type of container that appear in Sonic Adventure 2 and Sonic Heroes.

Description
The Cage containers are seemingly made of very powerful steel, as it is stronger than even Steel Containers, only being vulnerable to missiles or Power Type character. The cage is made of black metal with 4 bars blocking each side of the cage. They are more or less the same size as most other containers.

Sonic Adventure 2
In Sonic Adventure 2, cages have two main purposes. Their first role is to block the player's path, and due to their strength, can only be removed and destroyed by using missiles that are often found nearby, and this is seen in levels such as Eternal Engine.

It's second role in this game is more minor. Playing on it's nature of a cage, the Cage container will occasionally house animals as prisoners, which can only be obtained after rescuing them from their imprisonments. This is seen in levels such as Death Chamber

Sonic Heroes
In Sonic Heroes, Cages are much smaller than their previous appearance. The cages this time around can be broken by the player without the need to relay on missiles, though this is only possible when using the Power Type character of the respective team as the leader.

Cages contain Special Stage Keys, with multiple being scattered throughout each level. These keys are needed to be collected in order to access the Special Stage after completing the stage. They also, though much less frequently, contain item boxes that can aid the player.

Cages can be found on the floor as normal containers, but their are also variants with propellers on top of them that float in midair and must be brought down using the Thunder Shoot.