In Plants vs. Zombies: Battle for Neighborville, while there are normal versions in Graveyard Ops, there is a special boss variant that appears in the mission "Zombie Prepared."
Sunflower Queen's primary weapon is the Royal Sun Pulse, it can reach a far range and deals very high impact damage along with significant splash damage.
Abilities
Vine Whip: Sunflower Queen's melee attack. Uses this attack twice in one sequence. Deals immense knockback.
Sun Gather: Sunflower Queen will root into the ground and soak up sun for a short time. After she is done charging, she is able to use Solar Cannon and a charged version of Vine Whip for a short while. Whilst she is charging up, she will open the leaves at the bottom of her stem, exposing a core similar to the ones on the Mega Flower that, when attacked, will cause the Sunflower Queen to take critical damage. This can be taken advantage of by focusing on that spot for massive damage.
Solar Cannon: Only usable when Sunflower Queen soaks up sun. The Sunflower Queen deals extremely high damage and fires a constant laser, similar to Sunflower's Sunbeam.
When the slots land on three Sunflower Queen icons, a Super Mystic Wave will occur. Variants like Mystic Flower, Power Flower, and Zen Cactus replace the regular hero plants.
Keep in mind that unlike most bosses, Sunflower Queen does not take critical damage (Except from Super Brainz' Heroic Fists) despite her large head. Actually, all damage she receives will be reduced, no matter where she is hit. However, when she is charging up her Solar Cannon, a weak spot is revealed on her stalk, seemingly her belly, all damage dealt to this area will register as critical damage. It's best to use Z-Mech to take her out, because of the high damage it does, along with its powerful abilities. Out of all the Mechs, Z7 Mech would be the best choice, as it is able to damage her at a faster rate than other Mechs, negating her self-healing abilities, thanks to Z-8 Avenger's fire rate and damage. Super Brainz is good taking her out, as his Heroic Fists have closer range than her Vine Whip. Captain Deadbeard is just as good at taking her out, as its Spyglass Shot has a drastically longer effective range than her Royal Sun Pulse, so don't worry about getting hit from afar. Barrel Blast is also a good way to drain some of her health, but don't let her hit you with her Vine Whip, as it will disarm the ability instantly.
As soon as she summons her Mystic Flowers, take them all out immediately. They'll automatically start healing the Sunflower Queen and each other and can, if not stopped, heal her back to full health. Once again, Z-Mech, Super Brainz and Captain Deadbeard are the best choices for defeating the Mystic Flowers, as Z-Mech's Robo Stomp or Z7 Mech's Zomni-Blade can instantly vanquish them, Super Brainz's Super Ultra Ball or Super Multi Ball can quickly vanquish them and Captain Deadbeard's Cannon Rodeo and Barrel Blast are able to damage and defeat multiple Mystic Flowers at a time.
While the boss fight at first seems like they're just like any other Sunflower Queen, eventually she will reveal her gimmick, creating Sun Spots to become invincible, and there's only a starting 21 seconds to get rid of them all. Choosing a fast but heavy-hitting character is a must when waiting for Sovereign, or else they will get a massive power boost.
If all the spots are destroyed, there will be a moment where she is stunned, but be careful and pay attention for when that timeframe is over to avoid getting vanquished. Something else to note is that Sovereign is able to summon Sunflowers, which can heal her and even overheal her if not dealt with quickly, making previously established damage not matter. Prioritize them over the Queen. There are also Wildflowers, but they are more of nuisances rather than actual threats.
Elite Wave (Battle for Neighborville only)
The Sunflower Queen Elite Wave is about the same as Zombie Prepared, with the same side quest. Harder than Bitter Dill, but still quite easy. However, it can go VERY wrong if the team doesn't know what to do.
During the wave, she spawns Weeds, Wildflowers, and Peashooters to attack the player.
Once she loses a fourth of her health, she charges up, and becomes invincible. Sun spots appear around the map. Teamwork is needed most here, as they are usually spread out around the map. More spawn every time a quarter of her health is lost. Every time one is destroyed, the timer refreshes. If the timer runs out, the Sunflower Queen heals herself. Like other elite bosses, you have 10 minutes to defeat her. Failure to do so will result in a game over.
Unlike other Sunflowers, she usually does not smile by default.
An exception is that her boss icon shows her smiling, while in actual gameplay she does not. She will also smile whenever her Solar Cannon laser charges, as well as seemingly grinning while summoning Mystic Flowers.
Despite being a Sunflower, the Sunflower Queen does ironically not seem to be able to heal other plants.
This is the first boss to be Sunflower-themed, with the second one being Royal Hypno-Flower.
Both are also 2 of three female bosses, with the third being Marigold.
Most of her audio clips are similar to Sunflower's, except her voice is lower-pitched, echo-like, and is deeper than the normal Sunflower's.
Her Vine Whip may be a reference to the Grass-type Pokémon move of the same name.
When vanquished, her corpse has her showing a very depressed expression, which is similar to other Sunflowers but more extreme.
AI Sunflowers (whether or not summoned by the Sunflower Queen) have a tendency to prioritize her when choosing who to heal, supporting the theory of her being their Queen, given their surprising "loyalty".
In Graveyard Ops this is the only boss that appears when getting to the Landing Zone.
In certain countries, they are instead called the Sunflower Sovereign.
