Custom Movesets! I'll do mine too.
ROY THE BOY, YOUNG LION OF PHERAE, WIELDER OF THE SWORD OF SEALS
His sweetspot is in the center of his blade getting slightly weaker the farther it gets in either direction. So the hilt is just as weak as the tip. It's not the wet noodle of melee, but still noticeably weaker. He would be a semi-clone of Marth, with recognizable similarities, but still mainly a character of his own (a la Falco).
Flare Blade: Awaken the power of the Sword of Seals!
Ignite your foes with a quick strike of flame, or purge an entire area of evil by charging up and unleashing a massive explosion. A classic move that defines Roy.
Courageous Blade: Stand strong in the face of your enemies!
Roy gains super armor during his attack animation, but will take recoil damage from from the attack as well.
Flare Hammer: Strike down your foes!
The attack is much weaker, both in knockback and damage potential, but gains a meteor hitbox at the bottom third of the blade and hilt (get it? Strike DOWN your foes? Cuz you're spiking them! Ha... ha... please don't hurt me)
Let the decloning begin.
Sol: Unleash the power of the sun! TM
Stab your enemy, dealing respectable damage (~15-20) and healing for half the amount done.
Lion's Claw: Become the predator.
The predator does not "suck" from the prey. He crushes them without a doubt. Forsake the healing element of Sol, changing it into a dangerous and versatile KO move that can be also be used in the air.
Slow Burn: They will know pain...
Thrust your sword into your opponent, twisting your blade and igniting them from the inside. This move operates as a command grab, and will deal damage while the opponent is being grabbed, and then afterwards for a short time due to them being on ph1r3.
Rush: Revel in the glory of the charge.
Sprint towards the enemy with your shoulder, knocking them into their trip animation and dealing light damage. Moves you in close for a sweet spotted Forward Smash.
Counter: Strike when the moment is right.
These are a dime a dozen nowadays. Roy's is extremely powerful, but has a small window just like it always has been.
Inspire: BOKU WA MAKUNAI!!!!
Roy raises his sword and shouts one of his many beautiful lines. The enemies can't help but stop and watch as he shines radiantly, women everywhere swoon, men bow down their heads in awe. Even the lowliest of beasts stops crawling across the ground to recognize the might of the Lord Roy. If the sun had set, then it rises immediately, realizing that such a scene must be properly illuminated. The oceans lay silent, ceasing their battering of the shores, if only for a moment, to observe the greatness before them. Those who were not really feeling it, are now feeling it. This is the ultimate power.
(It's actually just a self buff that raises the power of his next two or three smash attacks)
Blazer: Light the Way.
Roar with the fury of the Young Lion, then defy gravity's hold on you, launching yourself up with willpower and flame alone, dragging anyone foolish enough to get close along in the inferno. Personally I love this move, so I wouldn't change it at all.
Rocket Man Emblem Ignition: 3...2...1...
I've seen this move in other mock movesets for Roy and I really like the idea. Roy slashes beneath himself, causing an explosion that launches him upwards with some control. He does not go into helpless afterwards, so he retains some defensive ability.
Critical Hit: Not like Aether at all
This is the Mercenary/Hero Crit animation from the GBA games, which Ike's Aether attack is based off of, so aesthetically they are similar. Roy leaps upwards, does a somersault, then slams down. Roy's is waaaaaaaaay cooler though because he leaves a trail of fire behind him as he goes up, then comes down with the impact of a meteor...er... figuratively. The knockback would be upwards and horizontal.
NORMALS
I'll just list the ones that would be changed.
Up smash: A broad slash above him that leaves a trail of fire with a hitbox of its own.
Down smash: Roy slams his sword straight into the ground, causing fire to spew out to both sides of him.
F tilt: A two hit attack, starting with a short ranged bash with the hilt of his sword, then a horizontal slash.
Nair: Gimme dat sexy PM nair.
Up Throw: Roy tosses the opponent up, then strikes them with his sword, causing high knockback. Kill throw at 140% on average fall speed characters.
Back Throw: Roy ignites his sword, then slashes his opponent, spinning in a circle and sending the enemy behind him. Sends at a low angle.
TL:DR- I liek smash broh. and I liek roy duh boi.