Waddle Dee Toss

Waddle Dee Toss is King Dedede's Side Special Move. He throws a Waddle Dee forward. Occasionally, he may also release a Waddle Doo or a much more damaging Gordo. Whatever he throws will remain on the battlefield for an unknown amount of time after using the attack. There is a 71.4% chance you will throw a Waddle Dee a 20.4% Chance you will throw a Waddle Do and a 8.2% chance you will throw a gordo. Only two Waddle Dees/Doos/Gordos can be spawned from one King Dedede, so every King Dedede on the map can have thrown two Dees/Doos/Gordos each. There is also a chance to throw a capsule instead of any of his normal minions. The chance of this occurring appears to be the same as or slightly less than the chance to throw a Gordo. The items released from the capsule when it bursts have also created speculation that they may have been directly thrown, although this seems unlikely.

If Dedede is near an existing Waddle Dee/Doo when he uses Waddle Dee Toss, he'll simply pick that up and throw it instead. This also applies for Waddle Dee/Doo's that came from other Dedede's.

If a Waddle Dee is thrown: does low damage (around 5%) if hit then walks around for awhile sometimes jumps and if an enemy is next to it when it does he/she will get hit and fly upwords. While its on the stage it can absorb and block almost any other projectile attack in the game. They also prevent many attacks being used as approaches, like Captain Falcon's Raptor Boost, Gannondorf's Flame Choke, and Ike's Quick Draw.

If a Waddle Do is thrown: does low damage (around 5%) if hit then walks around for awhile sometimes does its trademark beam attack which can stun an enemy in place for a few seconds. Can absorb and block projectiles and approaches (see Waddle Dee above).

If a Gordo is thrown: does around 25% damage if it hits and has high knockback (can kill at high percentage) if missed it will bounce on the ground and sometimes hover in the air.

If King Dedede if hit while doing the attack its interrupted but the Dees/Doos/Gordos will appear on the stage and walk/bounce around the stage.

Waddle Dee's and Waddle Do's can't be reflected well.

Origin
This is a unique move made for Super Smash Bros. Brawl, though it's not a very big stretch. Waddle Dees, Waddle Doos, and Gordos are all King Dedede's servants, and King Dedede throwing them around is not out of character at all. Credence to the theory Waddle Dees being Dedede's minions are seen in the Subspace Emissary, when a swarm of them helps him rescue the trophy-fied characters that Wario had been collecting.