You can't. You can't really use the Final Smash of any character in Brawl multiple times. Once you have a Smash Ball, the Final Smash is used by pressing the B button. Afterwards, to execute another Final Smash you'll need to break another Smash Ball. However, you can hit multiple enemies with Ike's Final Smash, if you can manage to hit multiple opponents in the initiating slash of the attack. Also, any opponents not caught in the attack but directly under Ike when he plunges back down to the stage will be launched with the other characters.
On Ike's final smash, he swings his now flaming sword, and whoever is within range flies up into the sky, Ike jumps after the opponent, slashes the opponent multiple times with the flaming sword, and ends the slashing with a slam with Ike holding his sword, slamming the opponent into the ground (the opponent will most likely fly off stage if damage is high enough).
get the smashball, get close to the person you wanna smash, and press the smash button
You can get ikes trophy by beating classic on any difficulty with him or you can get his final smash trophy by beating allstar with ike.
marth's for sure because his final smash is automatically a one hit kill regardless of how much damage someone has and regardless of the damage ratio.
First, you have to get All-Star Mode, which is unlocked from getting all characters. Then, beat it with the character's final smash of which you want the trophy of (Ike-Great Aether, [Toon] Link-Triforce Slash). You should have it after beating All-Star Mode.
Fire Emblem
no but marth and Ike are.
i think 16
you start out with him
he is not a unlockable character he is already there
Fire Emblem
I think there are bros. because, in Super Smash Bros. Brawl Ike helped Marth defeat the Pirmids.