Waddle Doo (Wadoruduu in Japan) is a enemy in the Kirby series and is similar to Waddle Dee. The only difference being able to attack nearby opponents with a beam and also has a huge eye for a face. They are among the most common enemies in the Kirby franchise.
Waddle Doos have appeared in Super Smash Bros. Brawl for the Wii. King Dedede will often toss the Waddle Doo when the player presses left/right + B. The Waddle Doo may also appear during his Final Smash. A trophy of Waddle Doo was present in the game, the description of which can be seen below:
"A creature identified by a single, unblinking eye. Like Waddle Dees, Waddle Doos roam about Dream Land and sometimes use parasols. Unlike their counterparts, though, they hate being approached--they'll fire a beam of energy at anyone who nears them, so don't think they're harmless like Waddle Dees. If Kirby swallows one, he copies the Beam ability and gains a jester's hat."
Waddle Doo - An entire site dedicated to the enemy.