Robirdo

Robirdo is a huge robotic version of Birdo in the game Super Mario Advance, replacing Mouser as the boss of World 3-3. It has the ability to shoot giant growing Eggs from its mouth. In its chamber are several chains that whoever the player chooses can climb to protect the player from Robirdo's attacks. However, an even easier way to avoid attacks is to ride on Robirdo's head, and wait for it to shoot eggs. The player can defeat it the same way they would defeat a normal Birdo; by throwing its eggs back at it. It has a charging attack and a jump that sends a shock wave along the ground.

Trivia

 * Robirdo is a portmanteau of "Robot" and "Birdo".
 * Robirdo often does a Ground Pound that sends a shock wave along the ground to stun Mario, Luigi, Peach, or Toad. This was likely inspired by the first boss battle of Donkey Kong '94. However, the player can avoid this on the chains or on Robirdo's head.
 * Robirdo speaks with a robotic version of the regular Birdo's voice. One of Birdo's quotes, "How could you?!", is also said by Robirdo in said voice.
 * It is unknown whether or not Robirdo is a sentient being, or of it's a mech that the actual Birdo is controlling from the inside, in a similar manner to Magnus Von Grapple and Brobot.