Orbot

Orbot is a robot built by Dr. Eggman to wait on him hand and foot and serves as one of his assistants. Orbot's main jobs are assisting Dr. Eggman in his schemes for world domination and making sure the processes of his plans are carried out correctly along with his counterpart Cubot. While Orbot is loyal to Eggman, he does not like him very much and usually points out his mistakes, much to Eggman's frustration.

Mario & Sonic at the London 2012 Olympic Games
In Mario & Sonic at the London 2012 Olympic Games, Orbot makes several appearances in the game's different events, along with Cubot as referees. In London Party mode, Orbot is one of the helping characters, where sometimes, when placing a sticker on a question mark spot, both Orbot and Cubot appear and copy an existing sticker on that page, placing it in a random spot that is not a question mark. Additionally, Orbot and Cubot have their own bonus game, "Orbot And Cubot Tag", where they try to trap the players in metal cages.

Additionally, when speaking to Metal Sonic in London, Orbot and Cubot appear above his head and talk to the player instead.

Mario & Sonic at the Sochi 2014 Olympic Winter Games
In Mario & Sonic at the Sochi 2014 Olympic Winter Games, Orbot appears alongside Cubot as one of the hosts for the Action and Answer Tour.

Mario & Sonic at the Rio 2016 Olympic Games
Orbot is the single player events host in Mario & Sonic at the Rio 2016 Olympic Games.

Mario & Sonic at the Olympic Games Tokyo 2020
Orbot reappears in Mario & Sonic at the Olympic Games Tokyo 2020 as a non-playable character.