His taunt where he says "Prepare Yourself" comes from the beginning of a battle sequence. When he enters one, he does that.
Aether, the B-Up, is a Metero Smash-like attack when it's coming down.
His aerial down attack is a Meteor Smash.
Ike is one of the few people who speak in the Subspace Emissary, saying "Great Aether!"
Once fully charged, Eruption (B) deals 10% damage to Ike.
Ike seems to have the power of Bowser, which is basically true, but Ike is faster. He is exceptionally fast for his overwhelming power.
Ike's sword, Ragnell, is a two-handed sword. AND HE HOLDS IT WITH ONE HAND.