Chrom for DLC!

Hits: 2 (trap)
First hit damage: 5% knockback: none effect: stun, heal 5%
Second hit damage: 5% knockback: standard
Total Damage: 10%

Description:
First, Chrom attacks with an upwards slash with a green hue. If he misses, he is fully vulnerable to attacks for thirty frames, similar to how failing with a typical counter attack would act. If he succeeds in attacking, he heals 5% of his health and attacks again with a fox illusion-like advancing slash. Good for healing, though it has low kill potential. Could be seen as Chrom's counterpart of the "counter" Dspec seen on most Fire Emblem characters in the Smash franchise.
In Awakening, Aether is much different than in Radiant Dawn/Path of Radiance; instead of following up your slash with a spinning attack, you would instead use Luna to dash forward with a very quick slash.

Hits: 2 (alternate second hit)
First hit damage: 3% knockback: low
Second hit "A" damage: 5% knockback: good
Second hit "B" damage: 4% knockback: none effect: grounded
Second hit "C" damage: 7% knockback: great
Total Damage: 8%(A) 7%(B) 10%(C)

Description:
First, Chrom slashes horizontally while moving forward slightly. Then, he can follow it up with one of three attacks:
(A): Executed with Fspec/Nspec directly after the first attack. Chrom jabs his blade forward very quickly. Similar to Shield Breaker and the Mr.Saturn item, it is very punishing against shields, though to a lesser extent.
(B): Executed with Dspec directly after the first attack. Chrom jabs his sword into the ground, grounding his opponent. When used on a hanging or airborne opponent, it spikes them downwards. Very effective for edgeguarding.
(C): Executed with Uspec directly after the first attack. Chrom shorthops upwards with his sword brandished, then crashes its blade down on his opponent. There is a slight delay while he is jumping, so a quick player may shield to avoid damage.
In Fire Emblem: Awakening, Dual Strike functions as an assist to an aiding ally, allowing them to attack twice after Chrom makes his initial attack. Chrom doesn't have any allies in this game, so instead he attacks on his own. Secondary Attack "C", however, uses a similar animation to his assist attack in Awakening.

Hits: None
Effects: Great knockback buff (specials only)

Chrom focuses for five whole seconds, eyes closed and holding his blade vertically to his chest. If he is uninterrupted during this, he gains blue afterimages and a great knockback buff to his offensive special attacks for one minute. Works very similar to Lucas' Offense Up. Charge cannot be stored, and effects remain even after contact with an enemy attack.
In Fire Emblem: Awakening, "Rightful King" increases the trigger rate of special skills executed by the user, hence in Crusade it should only improve the knockback of Chrom's specials.

Hits: five (rapid)
First hit damage: 1% knockback: low element: fire
Second hit damage: 2% knockback: very low element: fire
Third hit damage: 2% knockback: very low element: fire
Fourth hit damage: 5% knockback: very low element: fire
Fifth hit damage: 5% knockback: very good element: fire
Total Damage: 15%

Description:
Chrom dashes forward slightly, then rises upwards with his blade, enshrouded by flaming sakura petals. This works very similar to Roy's Uspec in Melee, as it traps opponents for multiple elemental hits in a rising slash. If it hits, the final blow exhales an explosion of petals, and the enemy suffers great knockback. Very fast, and very reliable for kills.
This attack is the signature move of the Player Avatar in Fire Emblem: Awakening. I figured I'd "Sakurai" around a bit and give him a move that he wouldn't normally be able to learn in order to have better representation of the game from which he originates.
In Awakening, when Ignis is used by the Player Avatar in his or her default class (the Tactician), the player dashes towards the enemy and follows it up with a rising slash covered in flaming sakura petals, similar to how it would work in Chrom's moveset.

Hits: 3
First hit damage: 15% knockback: none effect: stun element: electricity
Second hit damage: 15% knockback: none effect: stun element: electricity
Third hit damage: 20% knockback: outstanding element: electricity
Total Damage: 50%

Description:
First, Chrom uses a Master Seal to upgrade into the Great Lord class. Second, he uses the Fire Emblem to ascend his blade Falchion to create Exalted Falchion, a more powerful version of Falchion with a rainbow glow in its edge. Finally, Chrom slashes forwards, similar to Marth's Critical Hit. Chrom passes through the opponent, however, than follows up with a mirrored version of the same attack. To finish his opponent off, he slashes forwards one more time, with the image of the goddess Naga in the background. Spiraling energy covers Chrom's blade, and the final hit sends any enemies he comes in contact with flying offstage.