Intelligent Systems (株式会社インテリジェントシステムズ, Intelligent Systems Ltd.) is a Japanese game developer. They played a part in the development of Super Smash Bros. Melee and Super Smash Bros. Brawl. Similar to HAL Laboratory, they are a second-party developer for Nintendo and primarily create games for Nintendo's consoles.
Intelligent Systems has developed a number of Smash-represented series over their long history. They are the primary developers of such series as Fire Emblem, Paper Mario, WarioWare, Nintendo Wars, Panel de Pon, Pushmo, Kaeru no Tame ni Kane wa Naru, Cubivore, and Soccer. Intelligent Systems also developed Mario Kart: Super Circuit in the Mario Kart series, and co-developed Metroid and Super Metroid.
Aside from developing games, they also help Nintendo with certain projects, such as building the 3D camera into the Nintendo 3DS.
In its worldwide debut as a franchise, Fire Emblem receives major representation with two playable characters: Marth, the protagonist of the first game in the series, and Roy, a clone of Marth and the protagonist of the then-upcoming sixth game in the series. Melee is often cited as a major reason as to why Fire Emblem games from the seventh game onwards were brought overseas. Melee additionally received a medley of the tracks "Story 5: Meeting" and the main Fire Emblem theme, both from Fire Emblem: Shadow Dragon and the Blade of Light, simply dubbed Fire Emblem. A stage was also planned for the game, but did not make it in.
Outside of the Fire Emblem series, Cubivore saw representation in a trophy for a character named Alpha, though no such character exists within Cubivore itself.
As a result of its increased popularity as a franchise, Fire Emblem gained a large boost in representation in Brawl. Marth made a return as a playable character, this time joined by Ike, the protagonist of Path of Radiance and Radiant Dawn. A stage based around several aspects of the series, dubbed "Castle Siege", also appeared in Brawl, with numerous musical tracks from the Fire Emblem series. Lyn, the protagonist of the seventh entry in the series, also debuted as an Assist Trophy. Several other Fire Emblem characters appear as trophies.
The WarioWare series is represented with Wario as a playable character, with his default outfit being his biker attire from the WarioWare series, and his more classic overalls appearing as an alternate costume. A stage based around the microgames from the series, simply called WarioWare, Inc., appears as well, with multiple tracks from the games. Kat & Ana appear as an Assist Trophy as well.
The Infantry and Tanks from Advance Wars appear as an Assist Trophy, in the 8-bit style of their origin game. Lip's Stick, from Panel de Pon, also appears as an item, in addition to a Soccer Ball from Soccer. Soccer's theme also appears in a Famicom Medley on the Mario Bros. stage.
Fire Emblem gains more representation yet again, as Marth and Ike are now joined by Robin, the avatar character from Fire Emblem: Awakening, Lucina, a clone of Marth and a major character in Awakening, and Corrin, the avatar character and protagonist of Fire Emblem Fates. Roy also makes a return to the series as DLC. Lyn reprises her role as an Assist Trophy. A stage based on Arena Ferox, an iconic location in Awakening, appears in the 3DS version, while a stage based on various coliseums from the franchise appears in the Wii U version. A Mii costume of the Black Knight, Ike's rival, was also made as DLC.
WarioWare also gains new content, with a stage based on the Gamer minigame from Game & Wario appearing in the Wii U version, and Ashley debuting as an Assist Trophy. WarioWare, Inc. returns as a stage in the 3DS version. Kat & Ana reprise their roles as an Assist Trophy, as do the Infantry and Tanks.
The Paper Mario stage in the 3DS version features three locations from the series: Hither Thither Hill from Paper Mario: Sticker Star, the S.S. Flavion from Paper Mario: The Thousand-Year Door, and Bowser's Sky Castle from Paper Mario: Sticker Star along with the Paper Mario Medley. In addition, trophies of various Paper Mario characters appear.
The Sablé Prince, the main character of Kaeru no Tame ni Kane wa Naru, appears as an Assist Trophy. Pushmo also cameos as a collectable trophy in the 3DS version.
Along with all other Fire Emblem characters from previous entries, Chrom, the main protagonist of Awakening, joins the roster as an Echo Fighter of Roy. All Fire Emblem stages from past entries return, as well as Lyn as an Assist Trophy.
WarioWare keeps Wario as its playable character, and Ashley reprises her role as an Assist Trophy. Both WarioWare stages return, as does the Paper Mario stage. The Sablé Prince reappears as an Assist Trophy, and the Pushmo series has a music track in the game.