Holy crap, lots of questions.
Well, I didn't really expect anybody to actually ask about my moveset buuuuut here goes nuthin'...
Neutral B: The balls travel at most 3/4s of FD before they would disappear without hitting anything. The fireballs travel at Mario's fireball speed, but they move slightly faster when there's more of them. The fireballs don't increase in size, only number, maxing at, say 5-6, before the charge becomes the large fireball. Once the fireballs hit the ground, they burst into a small patch of fire (About a Kirby wide) that damages and knocks enemies back, in the air, they only knock back with fire damage before disappearing. He can store the charge of the attack and resume or use it again at a later point. Each fireball causes its own patch of flames, they don't get bigger but the fully charged large fireball gives a large patch of flames (two Kirby's wide). Obviously the fully charged one does more damage and knockback, but it also acts like Ness' PK fire to any enemies that make contact with it on the ground.
Side B: Yes, he can jump around while carrying an opponent. To use his bites or throws, you would press B/B+Direction to perform the attack. But of course enemies can break out of the grab just like traditional grabs, so they have a harder time freeing themselves at higher percentages. Seeing as how Ridley is suppose to be the king of the skies, he doesn't go into a helpless state after a missed Side-B or Up-B.
Up B: He can reactive Up B in order to cancel it, but otherwise he will use attacks and specials as if he were airborne. (Side note: his back-air wouldn't turn him around while in flight). The move behaves like ROB's Up B, he has a set amount of 'air time', so he can activate and deactivate his UP multiple times until he runs out of 'air time', after which he needs to recharge by landing on the ground. Yeah, the gust of wind does no damage and only pushes the enemy, the width of the gust is about Ridley's body size, so it's most effectively against enemies directly under him.
Down B: The radius of the special is just around himself, slightly bigger than what his shield size would be and it fully encompasses his body. Yeah, it would be fair that hitting a stunned foe with the special again would throw them back a set amount with minor damage tacked on. The direction launched would be determined by Ridley, as in the enemies will be thrown 'away' from Ridley, essentially the opposite direction relative to their position. So yes, it could be a pseudo-meteor smash in the air, but it wouldn't likely KO unless both Ridley and the other character are near the lower blast zone. It does have a wind-up and a little wind-down. so it's not an entirely safe move to use. In the air, the attack makes Ridley hovering in the air for a moment, but he will fall during the wind-up and end lag.
Normals: Sure, he can. Jab 3: Ridley swings down with both claws in front of him.
The Follow-up to his D-Smash would only work with the last hit that launches the enemy. Hitting shields would still let him use the follow-up smash, since it's making contact with an enemy.
Aerials: Neutral air is one-sided but with decent range. Up air would be similar to those attacks, but in addition, the first hit (his tail) would pull enemies down into the second hits range. Although, the tail swing can lightly knock enemies downwards as it swings down (similar to Pikachu's up air). It would be like Luigi's, giving damage and knockback with a single hit.
*exhales and flops*