Monochrome

Monochrome is a Keyblade from Kingdom Hearts II. Monochrome is obtained in Timeless River. This keyblade is a card in Kingdom Hearts Re:Chain of Memories

Acquisition
Monochrome is gained after clearing the Timeless River. In Kingdom Hearts: Re:Chain of Memories you can obtain this Attack Card by using the Key to Rewards in Olympus Coliseum.

Appearance
The Monochromes guard is a lifesaver float while the blade is a steamboat stack. The keychain is a ship's wheel, possibly the Steamboat Willie's. The teeth also resemble the steam whistles from Steamboat Willie. Other than that, the Monochrome resembles the speaking part of the Graham Bell phone.

Etymology
The word 'monochrome' is another word for one color, and is often used to describe things that are in black and white, like the world of Timeless River.