Source: Mega Man
Mega Man's "little sister" has joined the battle! In Smash, Roll has access to a multitude of weapons to help her in battle. However, due to the fact to she was not necessarily built for combat, some of her attacks may seem a bit...underwhelming at first glance. I should mention a few of her moves will be borrowed from Mega Man, but she is certainly NOT a clone of him by any means. As a matter of fact, her moveset is mostly a mix of her movesets in both Marvel vs. Capcom 1&2 and Tatsunoko vs. Capcom, with a few added moves from neither games here and there.
That being said, here we go!
Size - About Mega Man's height, if not a bit shorter.
Idle - Shuffles a little bit after standing for so long.
Weight - About as light as Diddy Kong.
Walk speed - About as fast as Luigi.
Dash speed - About as fast as Kirby.
Air attributes - Due to her skirt, she doesn't fall as fast as most characters. Overall, her air game is comparable to Pichu.
Jump - Gets slightly more height than Mega Man.
Jab - A simple jab. Nothing more, nothing less. Her weak punch in MvC 1&2.
S-Tilt - A slightly more forceful punch. Her medium punch in MvC 1&2.
U-Tilt - Roll kicks upwards. If the move is sweetspotted, her foot her opponent will be sent upwards, allowing her to follow up with an aerial attack.
D-Tilt - Roll performs a Slide Kick.
S-Smash - Swings her broom at her opponents, with a dust cloud spawning from the swing. The swung broom will do more knockback and damage, while the dust cloud will do damage, but it will only stun opponents.
U-Smash - Swings her broom above her in an arc.
D-Smash - Sweeps her broom rapidly on each side of her. The properties that apply to her broom when using her S-Smash also apply here, but this time, she sweeps so furiously, that fire is formed from the sweeping instead of just dust, giving her a great defense.
Dash Attack - Roll utilizes the Break Dash weapon from Mega Man V and strikes opponents with a shoulder tackle. Think of Wario's side special move in SSF2, but with its KO potential seriously nerfed.
N-Air - Roll swings her broom around her rapidly while doing a flip. Think of Kirby's midair Hammer in Super Smash Bros. Melee.
F-Air - Roll swings her broom in a downwards arc in front of her. This serves as a Meteor Smash if sweetspotted at the broom itself.
B-Air - Roll swats at opponents behind her in an arc. Think of King Dedede's BAir in Smash 4.
U-Air - Roll tosses a bucket of water above her head.
D-Air - Roll tosses a bucket of water downwards. This time, the bucket is also tossed by Roll, which can gimp recoveries.
N-Special - Roll Buster - Roll fires a chargeable shot from her Roll Buster.
Here's a list of differences from Mega Man's Mega Buster:
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Unlike Mega Man and his Mega Buster, Roll cannot move around when charging her Roll Buster.
The Roll Buster can also only hit one opponent at a time, similar to all of the Mega Buster's charges, save for the highest charge.
However, it CAN score multiple hits on the one opponent when fully charged, where as a fully-charged Mega Buster hits once and can travel through multiple opponents.
Roll also only has two charges for her Roll Buster, whereas the Mega Buster has 4-5 charges.
If fully charged, Roll can use the move as a "Stall-then-Fall".
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S-Special - Exploding Bouquet - Roll tosses a bouquet of flowers with a bomb hidden inside it. Not too useful outside of gimping recoveries.
U-Special - Tornado Hold - A massive fan suddenly appears underneath Roll, and quickly lifts her up. AMAZING vertical recovery, but AWFUL horizontal recovery.
D-Special - Down Time - Roll gets down in a kneeling position and summons a energy droplet from out of nowhere that heals her. The more you use this move, the less damage will be healed. However, the longest you go without using this move, the droplet will heal about 15-20% of her damage.
Grab - Roll grabs an opponent.
Pummel - Roll slaps her opponent.
F-Throw - Roll judo-throws her opponent forward.
B-Throw - Roll tosses her opponent behind her, this time with an Exploding Bouquet as a going-away present to them as well.
U-Throw - Roll smacks her opponent upwards with her broom.
D-Throw - Roll slams on her opponent with the butt. Think of Luigi and Princess Peach's D-Throws.
FINAL SMASH - Hyper Roll - Her strongest Hyper Combo Finish in the Marvel vs. Capcom games. Roll combines with Rush, Eddie and Beat to transform and attacks by releasing electricity from her antennae, large missiles from her breasts, and energy projectiles shaped like Beat, Rush and Eddie from her abdomen and legs. Roll is better off activating her FS off-stage, as opponents can easily get behind her when this move is about to be used.
U-Taunt - Adjusts and tightens the green bow in her hair.
S-Taunt - Roll puts one arm on her other arm, while fist-pumping.
D-Taunt - Roll instantly changes the outfit she's wearing into a Japanese schoolgirl's outfit for a second, and then changes back to her original look.
Victory animation 1 - Roll bends down to pick up a bouquet of flowers from Eddie.
Victory animation 2 - Roll talks to a hologram of Dr. Light, who congratulates her on her victory.
Victory animation 3 - Roll tosses her broom into the air, jumps, and lands on her broom while it's still flying.