Gadget Scientist is a premiumrarezombiecard in Plants vs. Zombies Heroes and a member of the Brainy class. He costs 5 to play and has 3/3. He doesn't have any traits, and his ability makes every science zombie on the field, including him, do a bonus attack when he is played.
By himself, Gadget Scientist is a weak zombie that only does one bonus attack, and is not worth the expensive cost. However, if you play him when there are other science zombies on the field, Gadget Scientist can wreak havoc against your opponent. Many science zombies benefit greatly from bonus attacks due to them either having a useful ability such as Kite Flyer and Zombot Drone Engineer, or simply have high base strength like Copter Commando and Zombot Sharktronic Sub. This allows you to create several finishing combos (often with high-strength zombies), making Gadget Scientist a good finisher and a game changer.
Since Gadget Scientist affects all science zombies on the field, it would be best to have as many science zombies as you can on the field before you play him. But since the science tribe generally doesn't support rushing (as its cheaper zombies have low strength), you should try to maintain tempo; in other words, keep your zombies alive while getting some more on the field. A late-game deck or a ramp deck would be optimal, as you get to play more cards per turn, thus making it easier to keep your zombies alive.
You can take advantage of Gadget Scientist's ability even more by giving your science zombies offensive traits such as Deadly and Frenzy, the traits given will result in more harm to your opponent's plants. Gargantuar Mime is also a powerful example, as he does an extra bonus attack per each bonus attack caused by Gadget Scientist.
As Super Brainz and Huge-Gigantacus, you could play Mixed-Up Gravedigger to reactivate Gadget Scientist's ability. But playing another Gadget Scientist may be better since he costs the same as Mixed-Up Gravedigger, but he doesn't reset any stat boosts unlike Mixed-Up Gravedigger. They can also bounce him with firefighter to reuse his ability.
If Wing-Nut is on the field, remove it quickly as bonus attacks will be disabled while it is on the field.
Against[]
Gadget Scientist is a pretty weak zombie on his own, but his ability is the dangerous part. If you see your opponent getting many science zombies on the field at once, they may be preparing for a Gadget Scientist to overwhelm your plants with bonus attacks; while many early to mid-game science zombies have low strength, they will have accumulated some extra strength thanks to some early Zombot Drone Engineers. Try to destroy as many of them as you can before that happens to make his ability less effective when he is played, or better, discourage your opponent from playing him at all.
If you think your opponent will play this, use high-health plants or those with the Team-Up trait to block the science zombies' bonus attacks. You can also play Wing-Nut (preferably on turn 4) to deter your opponent from just playing him. However, if you choose to block them, Super Brainz can use Super Stench to give all of them the Deadly Trait and easily counter your plants next turn. Wing-Nut is also prone to removal due to its ability hindering Brainy Heroes greatly (Backyard Bounce, Alien Ooze, Locust Swarm, Knockout, Exploding Fruitcake, etc).
Please note that only official translations are used.
Language
Name
Description
English
Gadget Scientist
Simplified Chinese
道具发明家
"Gadget Inventor"
Traditional Chinese
機械科學家
French
Chercheur en gadgets
German
Gadget-Wissenschaftler
Italian
Inventore di gadget
Japanese
ガジェット科学者
Korean
가제트 과학자
Brazilian Portuguese
Cientista Elétrico
Russian
Ученый с гаджетом
Spanish
Científico de los artilugios
Trivia[]
When Gadget Scientist is played and the plant hero blocks one of the bonus attacks and gets Transmogrify, and then uses it on another science zombie, the transformed zombie would still do a bonus attack even if that zombie doesn't belong to the science tribe.
If Gadget Scientist was given the Overshoot animation, then activates it, the satellite dish on his rocket will emit waves.
Due to the ability animation, this means that he used to have another ability in development, but was scrapped.
Brainy class. He costs 5
to play and has 3
/3
. He doesn't have any traits, and his ability makes every science zombie on the field, including him, do a bonus attack when he is played.
→ 3
Deadly and 
Frenzy, the traits given will result in more harm to your opponent's plants. Gargantuar Mime is also a powerful example, as he does an extra bonus attack per each bonus attack caused by Gadget Scientist.
English
Simplified Chinese
Traditional Chinese
French
German
Italian
Japanese
Korean
Brazilian Portuguese
Russian
Spanish
Brainy
Crazy
Hearty
Sneaky