Whoever says Ike sucks, I will beat down their door with Ness's baseball bat.
I once saw a tourney with all Ikes.
Quoted from the Smash Bros Wikia, not me:
Pros:
Incredibly powerful
Very long range on most attacks.
Heavy.
Neutral A combo and Side B are fast attacks that can be used to approach. Side B (Quick Draw) has incredible versatility, allowing him to perform numerous effective combos.
Up Tilt is long-ranged and quick.
Back Air is quick and immensely powerful.
Forward smash KOs at low percentages.
Two powerful, long ranged spikes.
Multiple attacks that can KO around as low as 50%.
Amazing horizontal recovery.
Aether (Up B) can edge-stall and deal damage to opponents who are near the edge, giving Ike one of the best edge-games.
Aether (Up B) and Eruption (Neutral B) give Ike some frames of Super Armor which can completely negate knockback, and are arguably the easiest Super Armor to use in the game
Nair is a fast attack if auto-canceled.
Most Aerial have good range and knockback.
Has both a strong vertical and horizontal recovery move.
Left and B or Right and B can be used to get back on the stage if falling, as his up B is very useless unless very close to the ledge.
Down B can block Link and Toon Link's final smash (the lazer) if timed correctly.