Shrink

The Shrink (スモール) is a Monitor power-up, that appears in Knuckles' Chaotix and is opposite to Grow. Monitors that have the power-up, show yellow downward-facing arrow icon on the screen. When obtained, this power-up make the playable character shrink twice the size of his body while his speed and jumping ability decreased.

Description
Depending who picks up the monitor power-up, only has the ability for certain amount of time, while the second character remains normal. After picking it up, the character suddenly shrinks up twice smaller than his normal size. During this, the arrow icon can be seen at the down left corner showing how long the ability takes.

While the character's speed and jumping weight decreases due of the ability, the character becomes more lighter, if the main playable character is gliding or climbing. The power-up's length takes 20 seconds which after that, the character will grows back his regular size.