Fourth Wall

&nbsp The fourth wall is a term used when somebody knows that he or she is in something and points it out, though they usually pretend like nobody's there.

In the series.
The fourth wall is broken every so often in the Animal Crossing series.

By who?
A number of characters break the fourth wall. Ressetti breaks the fourth wall the most. For example, afetr a player suitecases their player to City Folk, saves, and starts their suitecased player's file again, Ressetti will pop up, saying things like thanks for buying animal crossing city folk. Kapp'n may've also broke the fourth wall when, in the gamecube version, he mentions Mario and the land of Hyrule. Gulliver, in the gamecube version also breaks the fourth wall when he says that he fought giant serpants at some rock point, referencing a place in The Legend of Zelda: Ocarina of Time. Goldie breaks the fourth wall in Wild World. Her picture talks about Nintendogs.