Instead of assigning that dash move to one of the B moves, it should be Ridley's Dash A attack. It's a cool and strong move, but there isn't much else to it besides careening into the enemy.
I had started working on a Ridley moveset, and while it currently looks pretty good, I really want to get myself to think outside the box. When Nintendo created movesets for Fox and C.Falcon, they didn't really have any sources from their games. While Ridley does have some source, I think a lot more improvising needs to be done. For starters, I think his fire breath shouldn't be limited to B moves as well. He also needs something interesting besides his claws, tail, and flame breath.
Well, for what he does have, here are some ideas I have. (Okay...a little more than "some")
A,A,A - {Tearing Combo} - Ridley slashes to the right, then left, then extends his neck out and bites the enemy
>A - {Tail Strike} - A quick slap with his tail
vA - {Lawn Scissors} - Ridley extends his neck and snaps at his opponent's legs
^A - {Wall Rake} - Ridley swipes upwards with both claws, standing much taller in the process
Dash A - {Reckless Lunge} - Ridley lunges at the opponent at high speed, floating off the ground for a little bit
J, A - {Talon Gasher} - Ridley thrusts his foot claws forward to rip the enemy
J, >A - {Snake Whip} - Ridley's tail strikes semi-diagonally at the opponent
J, <A - {Beating Wings} - Ridley's wings extend and beat rapidly to slap up opponents behind him
J, ^A - {Windmill Tail} - Ridley spins his tail around rapidly. Can hit on all sides, but can juggle foes that are right above him.
J, vA - {Carnage Spear} - Ridley tries to land his foot claws on an opponent while his tail sticks straight down like a spear. (Hit opponents with the tip of the tail for a possible Meteor Smash KO)
Smash >A - {Dragon Batter} - Ridley lunges forward while spinning to strike hard with his tail
Smash vA - {Expose Panic} - Ridley slams his claws on the ground in front and his tail on the ground behind him while making an extremely intimidating pose
Smash ^A - {Billowing Flame} - Ridley exhales a quick blast of fire above him.
Z (Grab) - Ridley grabs his opponent with his claws
Z - {Maul} - Ridley snaps at his opponent with his jaws
Z, > - {Body Serve} - Ridley tosses his foe up a little, bends down, and smacks his opponent away with hsi tail
Z, v - {Violent Blaster} - Ridley pins his opponent down underneath his foot and blasts him with flames
Z, < - {Scrap Dispose} - Ridley wraps his tail around his foe and flings him away
Z, ^ - {Shoot Down} - Ridley throws his opponent high in the air and quickly exhales a fireball that explodes upon impact.
B -
Plasma Balls - Ridley can exhale intense balls of super-heated energy.
- Hold B to gather flaming energy in Ridley's mouth
- Press B to release a fireball. It doesn't move fast, but it's pretty strong
- The longer you hold, the more fireballs will be exhaled. (Up to 5)
- Ridley doesn't exhale fireballs in a long stream, but creates a spreading wall of these balls of energy
>B - (Uhmmm.....
)
vB -
Full Tail Assault - Ridley uses his versatile tail to attack anywhere.
- Press vB to whip forward with Ridley's tail
- Keeping B held, move the control stick around to strike a opponents.
- This is like Shiek's Chainl, but it's stronger and knocks opponent's away instead of comboing them and keeping them close
- Whenever the tail does hit an opponent, it retracts back a little and can't be used for a second
^B -
Carry Prey - Ridley will leap to the height of an average character while moving towards them, then land back down.
- If the opponent is near Ridley, he will capture them in his foot claws
- From here, Ridley can leap up to 3 times high in the air while carrying his opponent before automatically descending to the ground
- Pressing B immediately: Ridley will repeatedly claw-grope his opponent with his claws.
- Pressing B after 1 jump: Ridley will swing his tail around, slapping his foe 3 times, the 3rd hit knocking the enemy away
- Pressing B after 2 jumps: Ridley will drop back to the ground fast, slamming his opponent down.
- Pressing B after 3 jumps: Ridley pushes his opponent away a little, then exhales a damaging stream of fire that also pushes them away a good distance
- With each second and jump, it becomes harder to keep hold of an opponent. Using the claw-grope also makes it easier to escape.
- The opponent can rotate the joystick rapidly to escape faster.
- In case you didn't notice, Ridley's ^B doesn't get him that much aerial distance. This is because I think Ridley should have good vertical jumping abilities, but even better horizontal movment when he's in the air, so his recovery is similar to Donkey Kong in that moving horizontally is more important that vertically. Ridley should have a total of 4 jumps (excluding Up B) , but only his first jump should be high. His 2nd-4th jumps should be much shorter, similar to Jigglypuff's aerial jumps.
Okay! That would be my moveset, but this is for extending upon. I couldn't really think of any Forward B move, and I'll leave it up to another person to think of Ridley's Brawl attack. (Although, after looking at the Metroid Manga, one idea comes) So let's see what everyone else can come up with!