Cappy

Cappy is a major character in Super Mario Odyssey. He is Mario's main ally throughout the game, and assists him in various ways. Cappy is originally from the Cap Kingdom and joins Mario in order to rescue his little sister, Tiara.

Super Mario Run
Although Super Mario Odyssey is the first game in which Cappy is physically present, his first appearance in a game is in Super Mario Run. To promote Super Mario Odyssey's appearance at E3 2017, a statue of Cappy in the form of the Mario Cap was made available as one of the objects in Kingdom Builder on June 14, 2017, and costs 2,000 coins. When tapped after it is placed on the field, it will change to its original top hat form for a few seconds, while a voice can be heard exclaiming, "Cappy!"

In-game description
"Straight from Super Mario Odyssey! This statue is of Mario's new partner Cappy."

Super Mario Odyssey
Cappy is Mario's main partner in Super Mario Odyssey. Mario can throw Cappy in various ways; a straight up/down shot, a circular throw, and a boomerang-like shot. Cappy can also be held in place once thrown, so Mario can jump off of him or hit objects multiple times. Cappy can help collect items such as Coins for Mario, and also damage enemies. When thrown at certain enemies or objects, Cappy seems to "possess" them, allowing Mario to control them to get across stages. This ability is officially known as "capture". Cappy can also remove some poisonous hazards off of the ground in areas where some toxins may block Mario's path (such as the Wooded Kingdom). When thrown at power lines, Cappy allows Mario to transform into a ball of electricity and ride along the line; this is a major mode of transportation within the game. Cappy also informs the player of various aspects of the game and of the surrounding world, such as the local currency that can only be used in that world.

Cappy joins Mario in order to rescue his sister Tiara, who has been kidnapped by Bowser along with Princess Peach. He is "energetic but a bit timid." Cappy is also controlled by player two when in co-op mode.

Physical description
Cappy's normal form is a white top hat with large eyes, with blue wisps of hair coming out the top of it. Under the hat is his main body, which somewhat resembles an Eerie. When transformed into different hats, such as the Mario Cap, Cappy's eyes will appear on the hat. Cappy also comes in a variety of outfits, which can be purchased from the kingdoms' Crazy Cap stores, including a chef hat, top hat, builder hat, and a fedora.