Ike (アイク, Aiku) is the main playable hero in the ninth installment of the Fire Emblem series of tactical role-playing games, Fire Emblem: Path of Radiance, and also appears in a main role in its sequel, Fire Emblem: Radiant Dawn. Ike is one of the more "recent" Fire Emblem protagonists and was the first one to appear in multiple Fire Emblem console games that were released outside of Japan, so he has attained more familiarity with players than most other characters in the series have. He appears in Super Smash Bros. Brawl and Super Smash Bros. 4 as a playable character.
By 2005, the Fire Emblem series of tactical role-playing fantasy video games had fully been established as an internationally famous and successful franchise, thanks in no small part to the inclusion of previous Fire Emblem protagonists Marth and Roy in 2001's immensely successful Super Smash Bros. Melee as playable characters. After Melee, another game with FE characters was released outside of Japan, Fire Emblem: Path of Radiance, marking Ike's debut in a Nintendo game.
In PoR, Ike serves the traditional role of the Fire Emblem main protagonist in that the story revolves around him and his efforts of heroism, and that in terms of gameplay he is the game's one Lord-class playable unit; he starts out at a unique class level called Ranger with initially shaky battle statistics, but he grows into a top-quality Lord-class unit by the end of the game, on average maxing out most of his stats. The game's sequel, Fire Emblem: Radiant Dawn, extends the story and brings the overall story full-circle. It has been three years since the Mad King's War, and war engulfs Tellius once again as the various countries attempt to re-establish themselves.
In Ike's games he learns the Aether character skill, the most powerful of the skills in the game's newly introduced character skill mechanic, gives Ike a chance to perform a powerful two-hit combo, the first of which restores his Hit Points by the amount he damages, and the second of which attacks with the only half of the target's defense applied.
Ike, for being the second Fire Emblem protagonist to star in more than one game in the series after Marth and the first to appear on two subsequent games released internationally on consoles, is one of the better-known Fire Emblem heroes, and he enjoys the same popularity like Marth and Roy before him thanks to his role as a playable fighter in the Super Smash Bros. series. His appearance in Brawl is based on his younger Path of Radiance incarnation rather than his older, more muscular Radiant Dawn incarnation (which was used later in Super Smash Bros. 4), and his attire is what he wears while in his initial Ranger character class. It is interesting to note that he is able to use both the Ragnell sword and the Aether skill in his playable fighting appearance, even though in PoR he only gained the ability to use these when graduating into the Lord character class.
Ragnell is Ike's sword. Although it is a two-handed sword, he can wield it with only one as a testament to his strength.
The sword is used in all four of Ike's Special moves as well as most of his standard attacks.
It has the ability to release a shock-wave for long range combat, this ability does not appear to be usable in Super Smash Bros. Brawl, but it does appear to have replaced this ability with a fire element, as it never had the power to release fire in the Radiance series.
In Fire Emblem: Path of Radience and Fire Emblem: Radiant Dawn, Ragnell is a holy blade blessed by the Goddess Ashera, along with its partner, Alondite, which is wielded by the Black Knight. Ragnell and Alondite clash against each other, along with their respective wielders, in their rivalry throughout both games set on Tellius. Both swords are the most powerful in the game and have ranged attacks. In the ancient past of Tellius, Ragnell and Alondite were the twin blades of the Beorc warrior woman, Altina.
In Super Smash Bros. Melee
In Super Smash Bros. Melee, when the player puts in a name and selects "Random Name", one of the names will be Ike. Melee was released four years before Ike's first appearance in a game, indicating that this is merely a coincidence.
In Super Smash Bros. Brawl
Ike was the first Fire Emblem character to be revealed as a playable character in Brawl, wearing his battle-worn Ranger-class outfit. He clearly adheres to the human-swordsman aesthetic upheld by Marth and Roy in Melee, and his sword, Ragnell, appears especially hefty and long-range, but Ike is strong enough to hold it with only one hand. Ike's attacks are among the longest reaching and most powerful attacks in the game. To counterbalance this, Ike's attacks are notorious for being among the slowest attacks in the game, both start-up and ending lag wise. Ike also comes with his trademark skill Aether as a technique, which gives him launch resistance at the beginning of the attack when he and his blade are separated and he is hunched down to jump. This allows him to resist the knockback, but take the damage of an attack. He is based on his appearance in Fire Emblem: Path of Radiance. Ike is ranked 23rd on the current tier list in D tier.
According to Sakurai, Ike himself wasn't intended to be on the roster early on. Instead, Sakurai devised a blank character template of a slow and very powerful swordsman. Along with this, Sakurai wanted a new Fire Emblem character in Brawl. When discussing the potential new Fire Emblem character with Intelligent Systems, it was suggested he use Ike, being the protagonist of the latest two games in the series. Upon this suggestion, Sakurai considered Ike, and saw him to be a perfect fit for the aforementioned character template, leading to his inclusion as the new playable Fire Emblem character. This also debunks the common belief that Ike was included as a replacement for Roy, as his inclusion happened completely independent of Roy's status.
In Super Smash Bros. 4
As a playable fighter
Ike returns in Super Smash Bros. 4 as a veteran playable character, now using his design from Radiant Dawn.
Super Smash Bros. for Nintendo 3DS trophy descriptions