Fourth wall

In the Banjo-Kazooie series, the characters will state or do something that implies they are self-aware and know they are in a video game; this is known as breaking the fourth wall. The term "fourth wall" originated from plays when actors look or interact with the audience. Since the stage has a wall and two sides, this concept refers to an invisible wall behind the audience.

Banjo-Kazooie

 * "You've asked for this, I'm erasing your Game Pak! 3... 2... 1..."-Bottles, after being repeatedly called in Spiral Mountain, if Banjo and Kazooie ignore the tutorial.
 * "Me Mumbo, best shaman in all game." - Mumbo Jumbo
 * "Changed mind, T-Rex spell too good for this game, Mumbo save for next game." - Mumbo Jumbo
 * "No way. Me and Banjo were the stars of this game."-Kazooie during the B.B.Q. cutscene after the credits.
 * If the player collects all the Jiggies, then Mumbo, Banjo, and Kazooie will talk about Banjo-Tooie. They were even getting to see some secrets in that game.
 * "Stupid bear and dumb Kazooie, I'll be back in Banjo-Tooie!"-Gruntilda at the end of Banjo-Kazooie.

Banjo-Tooie

 * "Why, those thieving little..." "Careful, this is a family game!" "Oh, so it is." - Banjo and Chief Bloatazin
 * "It's nice to know not every character in this game is bad." - Scrotty
 * "One more press o' that button an' I'll run ye through!" - Captain Blackeye
 * Jamjars teaching moves, similar to Bottles, which he now broke more because of using the button icons.
 * "Pressing the joystick only slightly will make you tiptoe silently" - Signpost in Mayahem Temple. (Breaks wall because signs say things like "ever check here?")
 * "There ain't no tickets left. They sold out while you were playing Banjo-Kazooie!"- Officer Unogopaz
 * "Thank goodness, Kazooie won't want to see another egg for the rest of the game."-Banjo, after returning Terry last child.
 * "Aw no... It took me since the last game to save that..." - Gobi
 * "Bottles taught us loads in the last game." Kazooie
 * "He wasn't the favorite character in Banjo-Kazooie..." Kazooie, upon Bottles' death.
 * "I was the star of Banjo-Kazooie..." Bottles' Ghost
 * "Hey, Kazooie, there doesn't appear to be anyone in here." "Oh yes there is. The music's changed. Whenever that happens, we always end up in a fight." - Banjo and Kazooie, upon entering one of the rooms where they fight Klungo.

Banjo-Kazooie: Nuts & Bolts

 * Before a battle between Banjo and Gruntilda commences, the screen "pauses" and the word "PAUSED" appears on the screen.
 * L.O.G. mentions that everything in the Banjo-Kazooie world is a video game countless times.
 * "I would like to keep you like this, but I believe the people would like to take part in this game" - L.O.G.
 * "My fear is the people will not be able to form real words." Kazooie
 * Banjo-Kazooie and Viva Pinata discs can are visible in the game.