The "Bell Boom" ordinance in New Leaf is supposed to boost the town's economy by increasing how much the player earns and the prices of items in shops by an identical ratio. But wait, isn't that called... inflation?
Actually, inflation, in small enough amounts, can be healthy for an economy. And the increase actually isn't that much; We can reasonably assume that Bells are based off of Japanese currency, where Yen are closer to Cents as opposed to Dollars- Meaning that, using US currency, an apple that would sell for a Dollar would instead sell for a Dollar and Twenty Cents with the Bell Boom ordinance. Besides, inflation is a WEE bit more complex than an across the board 20% increase in the price of everything commonly bought and sold in stores.
The villagers even comment on the fact that it doesn't change much for them, but assume that it must be nice for the stores or something.
If you're stung by a bee and go to see a sick villager who you're very close with, they'll give you medicine for your sting before you can give them theirs. Since the one kind of medicine is universal, why doesn't the villager take the medicine they had, instead of making you get some? Though it could be a case of heartwarming, seeing as they give you their medicine even though they need it more.
The villager Champ, who can move into your town in Wild World and City Folk, is the train station manager from the first game, Porter. This is implied by his similar appearance, catchphrase being "choo CHOO" and having a model train station in his house. Also Porter returns in New Leaf, in which it's impossible to get Champ in your town, the only villager to have been removed from City Folk.
In New Leaf, they introduce a Pig villager named Kevin. Hmmm...
In New Leaf, Dr. Shrunk will only perform his jokes for you if you give him some fruit to eat. It's the developers' way of ensuring you will always have enough room when he gives you his jacket after telling you the last joke!
The villager Ribbot (A robot frog) is revealed to be scared of bugs on Halloween. Is it ironic that a frog is afraid of insects or fitting that a robot's afraid of bugs?
People have noticed that the Grumpy and Snooty villagers have gotten kinder over the course of the series. New Leaf shows that time really does pass by from one game to the next. This could mean that the Grumpy and Snooty villagers are getting nicer because of their interactions with the players in previous games.
The snooty Deer villager Diana new to New Leaf, has a house with a bath house theme. Her house, her name, and her species could be based off of the Roman story of Actaeon the hunter, who saw the maiden goddess Diana bathing. When she realized, she turned him into a stag, upon which he was pursued by his own hunting dogs.
The Harvest Festival. Tortimer wants to prepare a turkey feast, a Thanksgiving tradition… except the turkey in question is Franklin, who is clearly just as sentient as any other NPC in the game. Tortimer fully intended to kill and eat another intelligent, talking animal.
If you haven't played in a very long time, the villagers talk about how they haven't seen you in X months or X weeks. For example, this troper hadn't played in six years. He returned, and all the villagers claimed they hadn't seen him in 321 weeks. The fact that they have been counting every single week they've been separated from you is rather unsettling.
Erasing the town. You basically delete the town and its inhabitants from existence.
The realization that you likely will reach the point where you stop playing sooner or later, because life happens. And then the counting begins...
If a character moves from your town to a friend's town, then you erase your town and start a new one, and that same friend visits you and it turns out that same character is planning on moving again... and moves to your town showing you letters from your old character and singing the old town tune... that is just pure unsettling.
Normal villagers all apparently have a best friend called Mopina, who is a...mop. It's played for laughs and can be seen as just a tendency of a Cloudcuckoolander but according to Word of God, it's meant to be a symbol of their phobias of germs and disease. The fact that this mop is their best friend gives you an indication of how deep those fears go.
In New Leaf, you arrived into town and are told you're the new mayor that's been expected. You're told this as soon as you get off the train, with no previous knowledge. What happened to the person who was originally supposed to be the new mayor?
They send you a letter apologizing for making you go in their place and telling you you'll do an excellent job.
Tortimer was the last mayor. He's retired, and will sometimes invite you to his island in the game.
...And the mayor who was expected was supposed to replace him, but they didn't show up and the title of New Mayor was instead given to the player. As said above, the mayor sends a letter to the player, but what exactly happened that made them unable to come or why they decided to force the title on you is topic of another discussion.
Many people assume it was supposed to be Isabelle but before she actually got the job she chickened out and decided to throw it on the very next person who arrives.
In New Leaf, the stingray and hammerhead shark go in the same tank in the museum, even though the description for the hammerhead shark clearly states that these sharks have a great taste for stingrays. Not only that, but there's also some other predatory fish, such as the piranha and shark, that are in the same tank as fish that they naturally eat.
Tom Nook is a Tanuki, a Japanese mythological raccoon-like creature. One of its notable features are its large testicles. Tom Nook's only piece of clothing only covers that special area...
For added squick, his nephews/possible sons wear them too...
Until they renovate their store in New Leaf. As the owners of T&T Mart, their uniform doesn't have anything covering their lower body at all. Fortunately, they don't need to.
With Crazy Redd, in the Japanese version he's a Kitsune yet he doesn't have nine tails. So in equal fairness the Tanuki's aren't required to have youknowwhat.
The Gyroids are based off figurines found in ancient graves. When you dig them up, you are disturbing someone's remains. Even worse, since Gyroids exist, it's entirely possible that it could happen to your player character years after they pass away. And the haniwa they're based on were considered by the Japanese to be Soul Jars...
The fact that some of these Gyroids make silly noises that can even be matched up to whatever K.K. Slider song you have playing is a handy bit of Nightmare Retardant, though.
An item sold in Gracie's store in New Leaf is shearling boots◊. Shearling is the tanned skin from a recently sheared lamb or sheep that has the short wool still attached. It's possible to have sheep as villagers in the series, meaning that they are as sentient as any other character in the game. It wouldn't be like Gracie to skimp on the quality of her products, so one has to wonder just where the material for these boots is coming from...
The newest Octopus villager, introduced in New Leaf, is a Lazy villager called Zucker, who looks quite odd, with his head resembling a tan ball with sauce on it, and red tentacles. Turns out his appearance and Japanese name are based off of a sushi called takoyaki...which contains chopped octopus. He's based off off something he would be an ingredient in...yikes. It's almost cruel considering that lazy villagers are known for their love of food, and he's based off of a food he'd be in. Also, takoyaki is usually eaten on a stick. His head is pierced with a stick. There is a stick penetrating his skull, as if his head is a dumpling about to be eaten. All three octopi have something on their heads (Octavian-band-aid, Marina-bow) but to include a skewer-like stick on or IN Zucker's head is pretty creepy.