Codec Conversations is Snake's secret taunt on Shadow Moses Island where he talks about the other fighters with his support team, consisting of Mei Ling, Otacon, and Roy Campbell. Slippy Toad also talks with Snake when fighting Falco.
Each character Snake talks to has their own way of describing his opponent. The Colonel's descriptions are usually blunt and warning-like, and he may offer Snake careful advice about the character and encourage him to attack. Otacon's are the most descriptive, as he seems to know the most about them having conducted much research, and his attitude when speaking to Snake is either excited or worried. Mei Ling's descriptions are mostly emotional; she usually tells Snake of his opponent's dark or hurtful past if the character has one, but also shows sympathy for the characters and disdain for some of Snake's comments.
The taunt is performed by inputting the down taunt command for just one frame. If done correctly, Snake will kneel and touch the codec receiver in his ear. The codec message will begin soon afterward if Snake is left undisturbed.
Note: Oddly in the English version, when Snake says "Falcon Punch", only the "Falcon" part of it is extended. However, the text shows it as "Punch" extended (which mainly fits the Japanese dialogue more closely). This conversation is also a voice actor joke in the Japanese version of the game as Otacon's Japanese voice actor, Hideyuki Tanaka, also voiced Captain Falcon in the anime F-Zero: Falcon Densetsu (known to Western audiences as F-Zero: GP Legend).
Note: Otacon states that Mario and Donkey Kong still have an ongoing rivalry, however in Smash 64, Donkey Kong's Character Description states that the two have "Patched Things Up".
Note: This is the only codec that features Slippy Toad from Star Fox instead of Snake's normal contacts. The number "140.85" (Roy Campbell's codec number) appears in the Codec screen, indicating that Snake intended to call Roy, but Slippy interrupted the transmission and showed up instead.
Note: FOXHOUND was a special forces group that Snake and Colonel used to work in before it fell into the hands of Liquid Snake (one of Snake's brothers and the main antagonist in Metal Gear Solid) and became a terrorist group. Also, one of Snake's friends, Gray Fox, betrayed him. Finally, it could be referencing the fact that foxes are snakes' natural predators. Any or all might explain Snake's disdain for foxes.
Note: The "blood bond" that Mei Ling mentions is a reference to the strong sense of camaraderie between Popo and Nana, as they always appear together as a "two in one" character in Melee and Brawl. Snake's mentioning of the Ice Climbers fighting each other to see who gets to the top first is a reference to one of the two-player modes where both players must compete against each other in order to reach the summit first.
Note: Snake's comment about the marshmallow is a semi-accurate translation of the original comment in Japanese, in which he compares Jigglypuff to a dessert because Jigglypuff's Japanese name is "Purin," which is also the Japanese word for "pudding." Colonel also breaks the fourth wall by mentioning Brawl.
Note: In the original Japanese conversation, Otacon refers to Kirby as "Hoshii no Kaabi", meaning "Kirby of the Stars", instead of "Kirby from Dream Land". This is the official name of the series in Japan, and also the animated series is named after it (known as Kirby: Right Back at Ya! outside of Japan). Snake calls Kirby a marshmallow just as he does to Jigglypuff.
Note: This conversation pokes fun at Snake's tendency to be carrying a heavy assortment of weapons and equipment, up to and including 2 rocket launchers and 3 cardboard boxes, in a sort of hammerspace at any one time. Snake Eater attempted to alleviate this by imposing a carrying capacity limiting the amount of weapons the player can carry at a time, as well as their combined weight having an effect on their stamina.
Note: While Lucario is often referred as an "it" in Super Smash Bros Brawl, Snake and Mei Ling use the word "he." This is possibly because this Lucario is the Lucario from the eighth movie, which is referred to as a male. Also, Riolu (Lucario's pre-evolutionary stage) are usually born male, as the species has a 7:1 male-female ratio. In the Japanese version, Snake and Mei Ling use gender-neutral terms, which are more common in Japanese grammar and conversation.
Note: The "hardships" that Snake mentions is the reference of his internal conflict with his so-called "family" from Les Enfants Terribles, such as dealing with his twin brother Liquid Snake due to Liquid's "inferiority complex." Throughout the Metal Gear series (except Metal Gear Solid 3, Portable Ops and Metal Gear Solid V, where the player plays as Snake's "father," Big Boss), Snake frequently has to battle one of his "family members" as a boss fight, and most of the plot involves the evil deeds of one of his "family members" (particularly Liquid).
This conversation is also a reference to Mother 3, with the relationship between Lucas and Claus, Lucas' brother.
Note: The "La li lu le lo" is a nickname for an anonymous group in the Metal Gear series only known by their codename, "The Patriots". The Colonel's speech during this codec call is a direct reference to an event in Metal Gear Solid 2: Sons of Liberty, when the main character (Raiden) realizes that the Colonel that he had been taking orders from for the whole mission was just an artificial-intelligence look-alike of the real Colonel Campbell that Snake took orders from, in the first Metal Gear Solid. During the final parts of the game, the AI Colonel goes haywire and begins to utter disturbing statements (i.e. "Raiden, turn the game console off right now!" and "Honestly, though, you have played the game for a long time. Don't you have anything else to do with your time?"). Another thing to note is how in Metal Gear Solid 4, soldiers and PMCs who are under the use of nanomachines cannot simply call The Patriots by name - their nanomachines force them to refer to the Patriots as "La li lu le lo". This line is one of the strange phrases that the AI Colonel says to Raiden, which is also directly referenced in this codec conversation.
This conversation is also a subtle reference to the relationship of Solid Snake and his brother, Liquid Snake in MGS1. Liquid Snake lived under the shadow of Solid Snake, which contributed to the former's megalomaniacal nature. As well, it references the inferiority complex Luigi is assumed to harbor towards his brother Mario (much like the one Liquid Snake felt towards Solid Snake), as well as the condescending attitude the AI Colonel showed towards Raiden in MGS2. Finally, Snake's last line is actually a reversal and parody of his "Game Over" line ("Snake? Snake?! SNAAAAAAAKE!") from the Metal Gear Solid series.
Note: This message appeared in the Snake Joins the Brawl video on the Smash Bros. DOJO!!, also found in-game in the video archives.
Note: Snake is referring to the fact that in Metal Gear 2: Solid Snake, he found out that his war buddy Gray Fox was one of Big Boss' men. It also involves the fact that Big Boss was once the commander of Snake and, like Fox, he betrayed him. It should be noted that betrayal is a common occurrence in the Metal Gear series. Mei Ling's comment about Altea is slightly incorrect. Marth was indeed usurped by a backstabbing nation ruled by King Hardin, but Altea was the name of his kingdom, not the land as a whole, which was known as Archanea. Snake's comment about building an army from his enemies could also be a reference to Portable Ops and Peace Walker, where Big Boss could capture enemy soldiers to fight for his side.
Note: This is a reference to, and foreshadowing of, Outer Haven, Liquid Ocelot's ship seen in MGS4. There is a Mt. Rushmore-like structure on the ship that includes all the faces of Snake's family (or rather, everyone who has "Snake" in their codename, excluding Raiden, who only received the name "Snake" for a short while). Also, Snake claims he's seen the Halberd, which could be a reference to the Subspace Emissary, where he was a stowaway in the ship.
Note: Otacon says Game & Watch characters look like numbers on a calculator. A calculator is what inspired the invention of the Game & Watch.
Note: Psycho Mantis, a Russian renegade FOXHOUND member, appears in Metal Gear Solid as a boss. Like Ness, Psycho Mantis uses psychic powers to create devastating attacks. Snake's enquiry about mind reading refers to Psycho Mantis' main ability, which involves using telepathy to predict his opponent's attacks. In the game, his "mind reading" had the game read your memory card, and reference games you've played before fighting him. He also used his telepathy to predict your move inputs on your controller. To prevent this, the player will need to plug their controller into the player 2 slot.
Ness actually did have telepathic abilities in EarthBound, albeit limited to use on animals. Ironically, the Colonel's remarks on pyrokinesis are false, as it was Paula, not Ness, who learned that move in Earthbound, though Ness can use such abilities in all the Smash games he has appeared in.
Note: Snake's comment about Ocelot's old torture device is a reference to the torture scene in Metal Gear Solid in which Revolver Ocelot runs high voltage through Snake's body after Snake was captured. In nearly every Metal Gear game, the main character gets captured and sometimes gets tortured. Also, Mei Ling's comment about capturing Pikachu parodies the several codec requests that Naked Snake (the playable character of Metal Gear Solid 3, more commonly known as Big Boss, or Snake's father) receives from his radio team, asking him to capture some type of flora or fauna. However, it is more likely that Mei Ling is imitating a Lass from the Pokémon series, as one Lass begs for a Pikachu early on in the game.
Note: Snake's comment about Pit's 'Game Overs' could be taken either as a breaking of the Fourth Wall or poking fun at Kid Icarus' somewhat infamous difficulty. The Metal Gear series features many scenes that do indeed break the fourth wall, this being one of them in a sense.
Note: The irony is that the Colonel gives Snake orders (like the Trainer) while Snake is constantly sent into the field of battle (like the Pokémon). It is also similar to what Big Boss does during Portable Ops and Peace Walker, though he also takes part in missions on the field himself.
Note: This conversation is a fairly direct translation from the Japanese version. If it had been done to match the game's Region, the first comment would have referred to him as R.O.B. instead of the third, which would then have called him Robot.
Note: Otacon's first comment is referencing the first Metroid game, where Samus' gender was kept ambiguous (with the English guide specifically referring to her as male, where the Japanese was gender-neutral; some people even assumed her to be a robot) until the very end of the game, where she removes her Power Suit after the credits; the idea was added later in the game's development, at the suggestion of one of the staff members.
Note: Snake's disbelief in magic is a bit unusual, because the Metal Gear Solid series has two infamous characters (Psycho Mantis, a legitimate psychic from Metal Gear Solid, and The Sorrow, a medium from Metal Gear Solid 3 who was in fact already dead at the time the game was set and is encountered as a legitimate ghost) who have abilities that defy all forms of conventional science, even with the advances of nanomachines and genetics in the Metal Gear universe. Also, there is a slightly different wording in the Japanese version: he ends with "that and this are different".
Note: In the Metal Gear Solid series, the 'Les Enfants Terribles' is a cloning project that created Solid Snake as well as his "brothers" (Liquid Snake and Solidus Snake). They are all created from the DNA from their "father," Big Boss (in addition, the younger version of Big Boss almost looks like Solid Snake).
Even if a player performed a glitch causing 2-4 players to wear the same suit, Snake would still claim that their sneaking suits are different.
Note: While there has been a lot of speculation on the matter, no adequate explanation for Snake's animosity towards Sonic has arisen, and no reasons for the cryptic codec conversation have been provided by any official source. This may reference the fact that hedgehogs are natural predators to snakes. This may also reference to how the announcement on Sonic's inclusion in Brawl overshadowed the vast majority of the hype built up on Snake's inclusion or that Snake's Japanese VA, Akio Ōtsuka, is the son of the late Chikao Ōtsuka who played Sonic's nemesis, Eggman (coincidentally, Chikao also voiced Big Boss, Snake's father, in Metal Gear Solid 4). Otacon also breaks the Fourth Wall by mentioning that Sonic is featured in Brawl, and that everyone is excited that he's in it ("Everyone", being the players of Super Smash Bros. Brawl).
Note: In the Metal Gear universe, at least four people have had the codename Snake - Naked Snake, later known as Big Boss (Metal Gear Solid 3, Portable Ops), Solid Snake (known as Old Snake in Metal Gear Solid 4), Liquid Snake (Metal Gear Solid), and Solidus Snake (Metal Gear Solid 2). In Metal Gear Solid 2, there is another character called Raiden who had assumed the name "Snake" early in a mission and was being manipulated into playing the role of Solid Snake in a simulated recreation of the Shadow Moses Incident from Metal Gear Solid. His codename was later changed to Raiden to not confuse him with the enemy's leader's codename, who was also falsely going under the name of Snake. Only two of these Snakes (Solid and Naked) can be viewed in the Brawl Trophy rooms.
Note: This message appeared in the Snake Joins the Brawl video on the Smash Bros. Dojo!!, also found in-game in the video archives. Also, when the Colonel says "If his belly starts to bulge, watch out.", it could be a reference to the trailer where Wario's stomach expands and then lets out a huge Wario Waft around all of the other characters. It could also be a reference to the visual cue Wario gives when his Wario Waft has reached maximum power.
Note: Snake's comment "kind of strange for a wolf to have friends" seems a bit odd, since wolves are famous for hunting in packs. It's most likely a reference to Sniper Wolf, a Metal Gear Solid villian who, unlike other snipers, could shoot at Snake without help from a spotter. He could also be thinking of him as a "lone wolf".
If one listens carefully, the words "that's a" could be heard mumbled quickly in Snake's second line (too fast to be recorded as text in the conversation). Thus, the line is, "'Wolf'. [That's a] real imaginative name..."
Note: Snake wondering how Yoshi tastes could be a reference to Metal Gear Solid 3, where the protagonist, Naked Snake (later known as Big Boss, the father of Solid Snake), had to capture live animals and eat them to restore stamina. Whenever his team mate Para-Medic mentioned a new animal that she had found, Snake would always ask about its taste, much to her disgust.
Note: This is a reference to Sniper Wolf, one of Snake's female enemies in Metal Gear Solid, who doesn't show herself often and rarely moves from her position when threatening Snake.
Note: Mei Ling forgot that Samus was not just trained but literally enhanced, via Chozo genetics engineering; as such, Zero Suit Samus could possibly have the most changes compared to their own-universe counterparts, as she'd be very fast (probably only outrun by Sonic, who is himself much slower than he can be), quite strong, and (although rather irrelevant to Smash Bros.) highly tolerant of harsh environments, all without the Power Suit's aid.
E3 2006 Trailer
The following quotes are not in the game but they were used in the E3 2006 Trailer for Super Smash Bros. Brawl. Colonel and Snake speak in Japanese here.
Note: This is the only codec message which features three-dimensional model instead of two-dimensional illustrations, similar to conversations depicted in Metal Gear Solid 2. This is also the only codec message in the English translation that is not translated from Japanese.
If Snake gets KO'ed during a codec conversation, these special messages will appear, based on which of the four characters Snake is talking with. These messages also appear in the Metal Gear Solid series when it is Game Over and Snake dies, with the obvious exception of Slippy Toad.
Note, these messages do not play if Snake loses his last life in a stock battle.
"Snake, do you copy? Snake! Snaaake!!"
"Snake! What's going on? Snake! Snaaake!!"
"Snake! Don't quit now! Snake! Snaaake!!"
"Snake! Get up! Snake! Snaaake!!"