Lets see...
For his standing pose, he could be hunched over to a good extreme, his body facing the Camera, but his head facing the nearby opponents/ direction the played is directing him. His arms could be drooping down between his legs as he sways back and forth violently, occasionally snarling at the opponents and spreading his wings out behind him in a way that, he shifts his pose so that for a brief moment, his body is facing the controlled direction with his wings flared behind him on the 2D plane, which he then repeats and cycles as he stands.
Normal- Swipe of claw
Normal Combo- Swipe, hook by opposite hand whilst his head lowers, and finally jolt upwards resulting in the back of his head digging into opponent with an uppercut
Forward Tilt- Closes both hand claws in on his opponent with considerable wind up animation, but swift hitting animation
Down Tilt- Tail Sweep
Up Tilt- Spreads wings to the sky
Smash Forward- Opens arms widely, winding up his wings behind him before closing them in on the opponent in front of him
Smash Down- Upgraded Tail Sweep that Smashes both forward and behind (Ala, Yoshi, only he drags his tail on the ground, lifting the material)
Smash Up- Winds up his tail, ala Super Metroid's opening boss fight, and slams the opponent (More effective on Opponents behind and above him, as the hit box has very limited reach in front)
Aerial Normal- (Burst his wings out widely and furiously, letting out a slight shreik, ala again Super Metroid)
Aerial Foward/Behind/ Up- Slams with Tail ala Super Metroid's opening Boss Fight again. Long start-up, but incredible power
Aerial Down- Pogo Tail (First hit bounces Ridley back into aerial position, second, after used, puts him in helpless state)
Special Neutral- Fire Ball(?); Can be aimed 45 degrees or below in front of him, and can be used up to 2 times (3 times if second has impact). Very light and fast projectiles, but are also not damage heavy
Side Special- Command Grab; Ridley grabs the opponent, and can move with them for a limited range, dragging them along any passing surfaces. Opponents can escape as they do normal Grabs. Causes Sparks to fly that do minimal damage to passer by opponents behind, and can damage other opponents slightly more that are caught in the drag's animation from in front
Down Special- Ridley stomps the ground furiously, winding up for a sudden burst attack into the air a slight distance while causing great damage in collision. Cannot be used for recovery, as when used in the air, results in self-meteor effect. Cannot be canceled when coming down or going up; only on the ground by hitting the command a second time.
Up Special- Same flying animation as the Down special, but without wound up power.