The Grow (ビッグ,Biggu?, lit. "Big") is a Monitor power-up that appears in Knuckles' Chaotix and is the opposite to Shrink. When obtained, this power-up enlarges the playable character and increasing his speed and jumping skills.
The monitors with Grow feature a flat and upward-pointing blue arrow on their screen.
In the gameplay of Knuckles' Chaotix, where two playable characters are present, only the character who picks up Grow receives its effects. When picking up this power-up, the playable character are doubled in size. While at this size, an arrow icon can be seen in the lower right corner of the screen, which shows how long Grow stays in effect.
While the playable character is enlarged, his running speed and jumping height are increased. However, the character also becomes a larger target for enemies and the character becomes heavier to carry. Grow lasts for twenty seconds, after which the character returns to his regular size.