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'''MAC Spider''' was is a [[Mechanical Bakugan]] used by that [[Shadow Prove]] used in ''[[Bakugan: New Vestroia]]'' after the destruction of his previous Guardian [[Hades]]. It aided aids the Vexos by taking two of the six Attribute Energies from the [[Battle Brawlers]] and was is annihilated later on by [[Helios MK2]].

As its name suggests, MAC Spider's entire design was is akin to that of an arachnid, though it only had has six legs compared to an actual spider's eight. It possessed possesses a fully vertical optical sensor for extended vision. Each of its Its six legs were are barbed and were each are armed with extraneous needlesthat can be launched outward for ranged attacks. MAC Spider was is remarkably quick for a Mechanical Bakugan and couldits is capable of extending its legs to encompass an opponent and trap them. Its abdomen had is armed with two jagged spikes and housed houses devastating triplet cannons. Its most powerful abilities were are presumably '''Spider Cannon''' and '''Mega Terror Impact'''.

After [[Hades]] was is destroyed by [[Alpha Hydranoid]] in ''[[Shadow Attack]]'', Shadow unveiled unveils MAC Spider so that he can finish the brawl with Hydranoid and [[Fourtress]]. It successfully defeats [[Alpha Hydranoid]] and [[Fourtress]] at the same time, making use of its '''Mega Terror Impact''' as a final blow. MAC Spider subsequently becomes Shadow's new [[Guardian Bakugan]].

In ''[[Elfin On the Run]]'', Shadow Prove used uses MAC Spider again against [[Preyas]] and [[Minx Elfin]]. It is put to shame in the first round, and was aided being outnumbered by the two before being joined by [[Dryoid]]. Before eventually losing the entire brawl, MAC Spider overwhelms Elfin with its '''Spider Cannon''' ability and takes her Aquos Attribute Energy.

In ''[[Ambush]]'', MAC Spider was is used again, this time alongside [[Aluze]] against [[Knight Percival]] and [[Minx Elfin]]. MAC Spider, being empowered by the Vexos Trap Field, defeats Percival with minimal effort while Aluze does the same to Elfin. This results in the Vexos's acquisition of the Darkus Attribute Energy.

In ''[[Mylene's Meltdown]]'', MAC Spider made makes its final functioning appearance in a brief battle with [[Helios MK2]]. After Spectra activates a '''FARBAS''' ability to make MAC Spider's abilities useless, Shadow panics and activates '''Mega Terror Impact''' to defeat Helios quickly. Unfortunately for him, this leaves MAC Spider prone to attack and Helios capitalizes, using '''Blackout Cannon''' to blast a hole through MAC Spider's frame and destroy it entirely.

* Much like Hades, MAC Spider's strongest abilities often left leave it vulnerable to attack. The most notable one was is '''Mega Terror Impact''', which relied relies on shocking the opponent to keep them in place while charging a precision strike. [[Helios MK2]], having already activated a '''FARBAS''' ability, was able to resist the electrocution and fire a blast upward through MAC Spider's body, which ultimately destroyed it.

* Its '''Mega Terror Impact''' was is similar to the Adzam's Leader Weapon from ''Mobile Suit Gundam''.