He does not have any traits, and his ability gives all Gargantuar zombies on the field, including him, and any damaging Gargantuar tricks the Bullseye trait. This ability persists until all Wizard Gargantuars are removed from the field.
His name is a combination of "wizard," referring to his appearance, and "Gargantuar," the type of zombie he is.
His description is a reference to the trope "A Wizard Did It," which states that any minor continuity errors, nit picks, or similar things that appear in books, shows, or movies (especially fantasy-themed) can be explained with magic.
Statistics
Class: Brainy
Tribes: Mustache Gargantuar Zombie
Traits: None
Ability: All Gargantuars have Bullseye.
Set - Rarity: Premium - Rare
Card description
A wizard did it. An enormous, green, Zombie wizard.
▲ Ability change: Wizard Gargantuar now benefits Gargantuar tricks as well.
Strategies
With
By himself, he is a powerful zombie, as not only does he have above-average stats of 6/7, but also a good ability that helps a lot if you are running a Gargantuar deck. Like Smashing Gargantuar, he can allow multiple Gargantuars to have the Bullseye trait as long as he isn't destroyed.
Immorticia has the best usage of out him, as the Beastly class has the most Gargantuar zombies. For example, she can pair him with Smashing Gargantuar, making an extremely powerful combo, as they allow all Gargantuars on the field to plow through many plants and do a great amount of unblockable damage to your opponent in a single attack. Deep Sea Gargantuar, while not a powerful card in its own right, can still become extremely dangerous if your opponent does not have any Amphibious plants or instant-kill cards to counter him.
While not as potent as Immorticia, Rustbolt can play Gargologist to play Wizard Gargantuar earlier and surprise your opponent if they are unable to remove Gargologist.
Professor Brainstorm also has minor synergy with him, as Wizard Gargantuar's ability benefits Zombot's Wrath, a damaging trick. The same applies for Gargantuars that have been fused with Disco Dance Floor or are in Moon Base Z, as their Bullseye trait will apply to their Overshoot attacks. Other than that, however, he has no notable synergies, and it doesn't work with Gas Giant's "When Destroyed" ability.
However, Wizard Gargantuar's ability is only useful when you can hit your opponent, and your opponent may play plants to block your Gargantuars. To deal with this, you can either sneak in Wizard Gargantuar with Teleport/Teleportation Zombie, give the Gargantuars Frenzyby playing Smashing Gargantuar (Immorticia) or Coffee Zombie/Going Viral (Rustbolt), make them do bonus attacks, or play Bouncing, damaging, or instant-kill tricks on plants blocking them (Super Brainz/Huge-Gigantacus).
Against
This zombie is a huge threat, as he has great stats and the Bullseye trait for 6 brains. Getting rid of him should be a top priority, as he can do 6 damage to you without charging the block meter, and allow other Gargantuars to do that as well. Therefore, prioritize him over other Gargantuars, because Wizard Gargantuar's ability is arguably one of the strongest abilities out of all Gargantuars in the game.
The easiest way is to stall him by playing a plant in front of him in order to avoid taking damage, but this strategy doesn't last long, especially if there is a Smashing Gargantuar in play. You can stall by Freezing or Bouncing it, and even destroy it with Winter Squash.
You can destroy him by either using powerful plants or playing instant-kill cards such as Squash or Shamrocket. You can also use Doom-Shroom but be wary, as it may also destroy your plants when you play it.
Gallery
Plants vs. Zombies Wiki has a gallery for Wizard Gargantuar.