It costs 9 to play and has 9/9. It has the Gravestone trait and, when revealed, instantly destroys all plants on its lane and the lanes adjacent to it.
Its design is mostly based on the original Zombot piloted by Dr. Zomboss in Plants vs. Zombies, though this one features a completely enclosed cab. Its ability references the fireball attack unleashed by the zombot, which can crush any plants in the way.
▼ Ability change: "When played: Destroy all Plants." → "When revealed: Destroy all Plants here and next door."
Strategies
With
In most cases, this card is not a good card due to the fact most opponents tend to actually win the game before it could be played. And while it can take them by surprise (able to clear its own lane and those next door), the fact its ability is limited to three lanes means they can often set up beyond its reach if they do see it coming, making such plays suicidal. Nevertheless, Zombot 1000 does have limited applications.
Due to having the Gravestone Trait and how dangerous its ability could get when given the chance, it is best used in a deck with numerous Gravestones, which can help to exhaust enemy Grave Removal cards with smaller threats, leaving the opponent with none to defend against Zombot 1000 when it emerges.
All Beastly heroes have some minor synergies with Zombot 1000.
Immorticia can ramp with cards like Cryo-Brain to play it earlier. However, Teleport and Teleportation Zombie actively hinder this card, since they delay its ability activation and provide the opponent with a moment of respite.
Brain Freeze's Graveyard is redundant, but Cursed Gargolith's ability to hide all Gargantuars in Gravestones on turn end may prove beneficial, allowing it to potentially re-activate its ability again and again, essentially denying any plants played within its reach. Brain Freeze also has a large share of Gravestone cards, which can throw off the opponent earlier on.
The Smash can use Gargologist to play it early, but it isn't the best option, as one Gargologist has a hard time surving until at minimum turn 7, as well as him having many other cheaper Gargantuars to work with in the first place, and it doesn't patch any of the card's weaknesses.
Electric Boogaloo has no reason to use Zombot 1000 whatsoever due to his class combination being suitable for aggressive decks, and Zombot 1000 is simply too expensive.
If all else fails, try summoning Zombot 1000 using other cards. While the options are limited and based on chance, receiving a Zombot 1000 this way is much more rewarding, as it either costs less to do (in the case of Gargantuar-Throwing Gargantuar for any Beastly hero, and Portal Technician for Immorticia), or gives you additional fighters too (in the case of Gargantuars' Feast for Electric Boogaloo), all while potentially spelling doom to the opponent.
In general, Zombot 1000 is not a very versatile card due to how late it can be played and how little it does without specific strategies. It is only effective if your opponent will not be able to survive its ability due to running short on cards.
Against
Zombot 1000 can be extremely threatening in the right circumstances and can essentially win the game for your opponent, as it will almost guarantee 9 damage in its own lane and clear up adjacent ones, but the window of opportunity is usually slim. In general, the best strategy is to win before this card can be played.
If played normally, it is possible to get around the card and potentially hit an undefended lane, as Zombot 1000's ability only reaches so far.