I don't know if this apeared yet, I Like some of the the normals and the throws.
Did You saw this video: I like the difference between the Shield roll and the run attack
Now, This are my ideas for the specials:
I think BK should have a Red/Gold feather, Egg "usage mechanic" like Robin.
In this way, they could be powerful, but with this mechanic they wont be OP.
For a normal B they could use "Breegull Blaster", so Kazooie, could shoot eggs, but when they run out, she could do "Beak Bayonet".
with the alternatives being: a) "Fire Eggs Blaster" (with obvius properties) and b) just "Beak Bayonet", in this case it doesn't run out of anything, and hits hard.
For Side B, they could do "Wonder Wing", that could be a reflector on the run, with a sweet spot in the beginning for a heavy hit with a good knockback, when the GF run out, this could be just a tackle, like the "Speed crasher" Equipment in ssb4.
with the alternatives being: a) "Not so wonder wing", without the reflector property but damage dealing, and b) "Reflector wing", in this case it doesn't deal damage, but always reflect projectiles. Both of these can run out of feathers
Up B, they could use "Flight" on the ground, like Pit, but in the air it becomes "Beak bomb", when the RF run out, they just fly without dealing damage.
with the alternatives being: a) "Shock Jump", Just a high jump like Dedede, dealing damage on the landing, and b) "Wing whack", in this case just fly upwards and deals little damage but has a wind effect. both of these doesn't run out of feathers
Down B: "Clockwork Egg Lay", Like Bowser Jr Mechakoopas, just one at a time, and when they run out, just the sound.
with the alternatives being: a) "Grenade Egg Lay", with explosive propierties, and b) "Ice Egg Lay", it get stuck in the ground and Freezes on contact. Both of these can run out of eggs
All of this with a cool down time similar to Robin's. between 6 to 10 seconds
EDIT: I almost forgot, their equipment would be the Eggs for Attack, Feathers for Speed, and Clothes for defense (
http://www.ssbwiki.com/Equipment)
Hope you like some of these.