Boomdinero

Boomdineros are Bandineros with a cannon-like armor that appear in Wario Land: Shake It! They attack by shooting spiky balls at Wario from their top sides. Using shield-like arms, they can repel Wario's jump and dash attacks, bouncing him away. As shown in Prism Prison, they are also impervious to spikes, unlike other enemies. Wario can perform an Earthshake Punch near a Boomdinero to stun the enemy, then pick it up and shake the armor off; another way to destroy a Boomdinero's armor is to charge into it from a Max Fastosity Dasherator. Boomdineros are heavier than other enemies, as Wario slows down while carrying one, and they cannot be thrown with power to defeat them. These enemies are summoned by Bloomsday.

There are two varieties of Boomdineros. Silver ones are stationary, shoot one spiky ball at a time, and take a while to react. Red ones walk from side to side, shoot spiky balls faster, and react more quickly.

Strangely, there is also one separate variety of a Silver Boomdinero located only in Derailed Express on the escape sequence, in the room with many Bandineros on the train coach. This variety walks side to side like the red variety, but never actually shoots spiky balls at Wario. It is the only one of its kind, and it's unknown whether there was a programming bug with this particular Boomdinero that causes it to behave this way.