Tomodachi Collection and Tomodachi Life contain many references to other Nintendo games, non-Nintendo games, real world locations, or, in Tomodachi Life, references to Tomodachi Collection.
References to Other Nintendo Games
The Legend of Zelda
A dialogue between a Mii states that "It's not healthy to keep things bottled up. Except for potions and fairies."
The tunic & leggings description is "It's great for going on an adventure."
While sleeping, Miis might say "It's dangerous to go alone, take this."
In a dream in Tomodachi Collection, the dreaming Mii says "Hey, Hey, Listen!"
A dialogue between a Mii who owns a 3DS XL might say "I want a new 3DS game. Maybe something with Rupees...."
The description for the expensive-looking vase is "No matter how tempting, try not to break it. Think of all the games you can buy instead."
While sleeping, Miis might say "Do a Barrel Roll!"
The description to the Frog hat in Hats states that the hat looks "familiar". It resembles Slippy.
Super Mario Bros.
When a Mii receives a letter to go up to the roof, the awaiting Mii may say "Our princess is in another castle."
In the Mushroom's description, it states "Maybe it will make you grow bigger!"
During a Pity Party, one of the jokes a Mii might say is "Why is Luigi taller than Mario?"
Sometimes, in the UK version of Tomodachi Life, a sleeping Mii will say "Please, take me with you." This is a reference to Toadette from Mario Super Sluggers.
An NES, ROB, Virtual Boy, Super Scope, Game Boy, and Game & Watch can all be acquired as treasures.
In the Banana peel description, it states that is "makes karts peel out." This is a reference to the Mario Kart series.
During the summer, at the island menu, cicadas and other assorted bug sounds can be heard. These sound effects are recycled from Animal Crossing: New Leaf.
The description for the ROB treasure states that he is a brawler, referencing his inclusion in the playable character roster of Super Smash Bros. Brawl and Super Smash Bros. for Wii U and Nintendo 3DS
The description for the clay figure is "This clay figure looks sort of familiar. Did you find it in the ground?" which is a reference to how a player gets gyroids in Animal Crossing, by digging them up from underground.
The description for the carnation is "Give this to your prom date or maybe to your mom on Mother's Day." which is a reference to how the player receives pink carnations from Mom on Mother's Day in Animal Crossing.
When a Mii is given a Wii U either playing with others or playing by his/herself, similar noises and controls can be noticed. These are meant to be the "Takamaru's Ninja Castle", "The Legend of Zelda: Battle Quest" and "Metroid Blast" attractions (mini-games) from the game Nintendo Land, and the PIRATES minigame from Game & Wario.
If the player investigates what went wrong after a depressed Mii fails to resolve an argument, they might see a cutscene where the two Miis were still throwing items at each other. One particular quote, "FALCON THROW!", is a reference to Captain Falcon's iconic attacks.
In several instances, the number "1889" is displayed. This is a reference to Nintendo, as it was founded in 1889.
A Mii might say "I'm having some friends over to play Wii U. I'll need lots of chips. And salsa!" if they have a Wii U.
References to Non-Nintendo Games
Tomodachi Quest is a parody of Dragon Warrior/Dragon Quest, with examples such as the overworld map, and the intext battles.
One of the possible Mii Dreams is named as '20XX' in the European and British versions of the game. This is a reference to the events of Mega Man 2, which takes place during 20XX.
When playing with a fan, a Mii will sometimes say "All your fans are belong to me." This is an alteration of the original text "All your base are belong to us," from Zero Wing.
The Safety Helmet somewhat resembles the hat worn by the Mega-Man enemy, Met. They have a similar color scheme and share the design with the lines around the bottom.
Sometimes, if a you visit a Mii's apartment, they will pretend to run at the speed of sound. The Sonic the Hedgehog franchise gets referenced at these moments, where the main character, Sonic, runs at the speed of sound.
References to the Real World
The destinations for travelling using the travel ticket and honeymoons are all real world locations. Miis will also comment on landmarks while visiting these locations.
In the UK version, a Mii playing with a fan will sometimes say "Exterminate!", imitating the Daleks from the TV show Doctor Who.
Sometimes, the morning market merchant may say "There are restaurants that are known to steal my recipe", a possible reference to SpongeBob SquarePants, where the antagonist, Plankton, commonly attempts to steal the Krabby Patty formula from the Krusty Krab.
The description for the tuxedo says, "Just remember that you DO NOT have a licence to spill." This is a reference to Licence to Kill.
In the Superhero dream, the dreamer holds up a food item, says "By the power of (food name)" and then transforms, similar to how transformation happens in magical girl genre of anime. For example, Sailor Moon holds her hand up in the air and says "Moon Prism power, Make Up!" to transform. It could also be a reference to He-Man, where the title character holds up his sword and says "By the power of Greyskull!" to transform.
One version of the Unbelieveable dream has a Mii saying "If you swallow watermelon seeds, a watermelon will sprout from your belly button." which is a reference to the Rugratsepisode "The Inside Story".
The description for the trucker hat (which looks similar to Ash Ketchum's hat) says "This hat is the best. in fact, it's the very best.", which is a reference to the first Pokémon theme song which starts out "I wanna be the very best."
The description for the Gold Trophy also has a reference to this song. You're the very best--the best there ever was.
The tweed dress' description says "You feel the need. The need for tweed." which is a reference to the several Need for Speed movies. This was also similar to a quote from Tom Cruise in the movie Top Gun, which was "I feel the need, the need for speed!"
The sailor outfit's description says "Pair this outfit with a healthy serving of spinach--you'll be unbeatable.", which is a reference to Popeye the sailor man.
When Miis are sleeping they might say "Oh it's my dad. Oh I thought you were someone else." This is a reference to It's My Circus
When the player chooses for a Mii to ask another Mii out by singing a song, one of the possible songs is "♪ Let's gather round the campfire and sing our campfire song. Our C-A-M-P-F-I-R-E-S-O-N-G song" This is a reference to SpongeBob SquarePants
The description for the sailor dress says, "Go boating, or maybe fight some crime." This could reference the Sailor Moon series.
The description for the striped dress shirt says, "Enjoy the nonconfrontational comfort of a plain striped shirt. This could be a possible reference to two iconic episodes of the sitcom Seinfeld, The Pez Dispenser and The Jacket.
In the European version of the game, after viewing the Workout/Muscles dream, you are given some spinach. This could reference Popeye
The description for the Rain interior says it's "Great for singin' and dancin'." A reference to the 1952 film "Singin' in the Rain"
The description for the green juice drink says "It's not easy being green juice", which is a reference to Kermit The Frog's catchprase.
References to Books
The red and white striped shirt's description says it will "make you stand out in a crowd" which is a reference to Where's Waldo, where Waldo wears a red and white striped outfit.
The pinafore's description says "Throw this on for a hop down the rabbit hole. Beware the Jabberwock.", which is a reference to Alice in Wonderland, where Alice wears a pinafore.
The Trench Coat description is "Solve the mystery of fashion with this sleuthing-ready trench coat." which references Sherlock Holmes.
The Flannel Shirt's description says it "goes great with black-rimmed glasses" which could be a reference to hipsters, as the typical representation of hipsters is wearing flannel and having thick glasses.
The Gamer interior costs $1,337.00. This refers to 1337, a number that seems to spell LEET (as in elite) when turned upside down.
References to Music
When Miis are sleeping they might say "<name>, please don't leave me." It might be a reference to P!nk.
The description for the reggae hat says "Get up, stand up, and get groovy in this easygoing reggae hat." which is a reference to 'Get Up, Stand Up' by Bob Marley and the Wailers.
The description for the Rockabilly Dress says "He may be nothing but a hound dog, but you're a total cutie in this dress." which references Elvis Presley's hit song Hound Dog.
The description for roasted chestnuts says "Roasted on an open fire. A favorite winter treat for kids from 1 to 92." which is a reference to the song Chestnuts roasting on an open fire by Nat King Cole.
The description of the bonnet hat is, "If my bonnet flies over the ocean, please bring back my bonnet to me." This is a reference to the Scottish folk song "My Bonnie Lies Over the Ocean".
The description of the hippie clothes say, "What you wore is over, if you want it. Give this piece a chance." This makes an obvious reference to songs "Happy Xmas (War is Over)" and "Give Peace a Chance" by John Lennon.
The Description for the Birthday Cake reads "They say it's your Birthday. Happy Birthday to you." This is a reference to the Beatles song Birthday.
The Description for the chauffeur uniform read "No Car? No Problem! You've got a driver's outfit and that's a star." This is a reference to the Beatles song Drive My Car.
References to Other Tomodachi Games
On a vacation to Switzerland, the Mii will stop at the Swiss Alps, striking a pose as if they were to shout at it. This could be a reference to the DreamMountain from Collection.
In the Café, some of the music used in Collection can be heard on the Cafe's radio.
The Japanese version also uses the default lyrics from Collection
Several sounds and music from Collection are reused in Life, with some being remixed.
Question Hall's voting music from Collection is remixed for Life's Judgement Bay.
Music for when a husband and wife broke-up from Collection return in Life.
Town Hall's music from Collection is remixed for Life.
Several Islander Games, events, and items from Collection return in Life.
The Japanese version reuses the appearances of Interiors directly from this game.
"All-Time favorite" foods and "Worst" foods return in Life.
The Japanese version of the game contains the dream "Familiar", which involves a picture of the island from Collection as well as the original background music.