Pipe

Pipe is a gimmick that appeared in Sonic Adventure 2 and it's sequel. It is simply a small tube that hides animals or bombs in it.

Description
Pipe is a white small tube that can be seen on every Sonic Adventure 2 's grounds. Pipe main purpose in gameplay, is to give the player more animals to use in the Chao Garden, but sometimes it has also bombs. To use in gameplay, the player has to press the B button nearing of one these pipes to collect the animals that they have. If the player collects all the hidden animals on a mission then he will get an extra life.