The first ReBoot episode produced, despite the fact it was always intended to air second in the broadcast schedule.
First Appearance of Hexadecimal, the benign chaos virus. Also the first appearance of Scuzzy, Hexadecimal's pet.
The Debut of the Nulls (slug like creatures that were once Sprites and Binomes alike, after they lost while playing inside a game cube).
The stadium signs in the game are called 'Monacode Racetrack', a pun on the Monaco Grand Prix.