Gunyolk

Gunyolk is a large mechanical monster created by the Factory Chief, one of the most important members of the Smithy Gang, and appears in Super Mario RPG: Legend of the Seven Stars. The mechanical creature is used as a weapon in an attempt by the Factory Chief to defeat Mario and his allies. In fact, Gunyolk and the Factory Chief are the last enemies that are standing between Mario's group and the leader of the Smithy Gang, Smithy.

Gunyolk is by far the greater threat in the battle. Every odd-numbered turn, Gunyolk will choose from two pools of options: in the first pool is its normal attack and Echofinder. Echofinder hits one character for 1.5x the damage of its normal attack and inflicts Silence, and is chosen with 1/3 odds, while its normal attack is favored with 2/3 odds. In the second pool is Mega Drain and Electroshock; Mega Drain inflicts magic Fire damage to a character, while Electroshock does the same with Thunder attribute, but is almost twice as powerful. The odds of its second pool's options are 2/3 in favor of Mega Drain, and 1/3 in favor of Electroshock.

On every even-numbered turn, Gunyolk will use what makes it so deadly: Breaker Beam, previously used by the Axem Rangers; unlike them, however, Gunyolk does not need to waste turns recharging after using it. Breaker Beam will easily do close to or over 100 damage to the entire party. Because of Breaker Beam's power, it is perhaps preferable to focus all efforts on taking out the Gunyolk first.

Unusually for a boss, especially for one at the end of the game, Gunyolk has no resistance to status ailments whatsoever. If Princess Toadstool is in the active party, she can use Mute to inflict Silence on the machine: this will block its access to magic, including Breaker Beam. She can also use Sleepy Time to afflict it with Sleep, rendering it incapable of any action until it wakes up; if this is done, magic should be the party's primary source of damage, as physical attacks will awaken a sleeping target. If Bowser is in the active party, he can use Terrorize to inflict Fear on the Gunyolk and Factory Chief, reducing the damage they inflict and increasing the damage they take. A Fright Bomb can also be used for the same effect. Aside from status ailment abuse, Gunyolk is weak to Ice and Thunder, so Mallow's Snowy and Shocker are capable of dealing massive damage.

A beta enemy palette swap of Gunyolk exists that is unused in the game. It normally only attacks, but will use Lightning Orb every six turns.