Moves
Moonblast is Florges's strongest STAB option, hitting threats such as Hydreigon, Krookodile, Mega Altaria, and unboosted Latias hard. Synthesis gives Florges instant reliable recovery, which is useful when compared to its competition as a cleric. Aromatherapy lets it remove status conditions from teammates. This is especially useful for clearing burns from the Steel-types and Toxic poison from the Water-types that are commonly run as teammates. Wish gives Florges another recovery option, letting it choose between healing itself or switching to a teammate, although its low HP stat compared to other clerics makes it worse at performing this job than its competition. Toxic is also an option in Florges's fourth slot for whittling down foes more efficiently, as well as allowing it to more easily check Calm Mind Latias. It should be noted that most of the defensive Pokemon Florges lures in are immune to Toxic or can circumvent it with either Regenerator or Natural Cure, however. Hidden Power Fire is an option for dealing with Scizor, which Florges lures in, 2HKOing any set while also making Florges less passive versus other Steel-types like Klefki and Bronzong, though it gives up the utility of either Wish or Toxic.
Set Details
252 HP and 252 Defense EVs with a Bold nature give Florges as much physical bulk as possible, giving it a better chance at switching into the physical Dark- and Fighting-types it wants to check. Leftovers provides passive recovery that helps Florges perform its role as a cleric for longer periods of time. Both abilities Florges has are completely worthless, so it doesn't matter which one you choose. A spread of 252 HP / 120 Def / 136 Spe can be used to outpace Bewear and Timid Primarina, which allows it to reliably beat them with Moonblast, the latter only if also carrying Toxic.
Usage Tips
Be careful of preserving the PP of Aromatherapy. When running into a Toxic user that Florges can’t beat with Moonblast, such as Empoleon, Alomomola, or Blissey, it's best to save its ability to clear status and switch to a proper check instead of trying to brute force through Toxic. Therefore you should bring Florges in on Pokemon like Hydreigon and use Wish a lot early-game if Florges is not in dire need of healing. By using Wish as a buffer for your teammates, you can pivot into your wallbreakers more easily, knowing they will have some health restored. This also allows Florges to preserve the limited PP of Synthesis, which it is reliant on to better handle threats like Krookodile and Latias. Toxic should be used to whittle down Pokemon like Alomomola, Primarina, Volcanion, and Mega Slowbro, which it is unable to threaten otherwise with Moonblast. Toxic is also extremely important when combatting Calm Mind Latias, as the combination of poison and Moonblast allows Florges to beat it one on one. If running Hidden Power Fire then it should mostly be used when you expect Scizor to switch in, as it is often too risky to keep Florges on the field in case Scizor uses Bullet Punch.
Team Options
Florges fits very well onto common balanced teams, letting it support the other members of a defensive core and keep offensive threats free of status. It can also support common sweepers on bulky offense such as Lucario, Calm Mind Chandelure, and Nasty Plot Infernape, which appreciate Wish support and Florges inviting in Steel-types for them to set up on. Steel-types such as Mega Aggron, Mega Steelix, Empoleon, and Cobalion support Florges well by checking the opposing Steel- and Poison-types that Florges has trouble with, as well as setting up Stealth Rock to give it more breathing room to find chances to use Aromatherapy or recover lost health. In return, Florges switches into Fighting-types like Infernape that would beat them and can recover their health if running Wish. Ground-types such as Swampert, Hippowdon, and Rhyperior check the Steel- and Poison-types that like to come in on Florges, and they also block pivots attempting to use Volt Switch on Florges to gain momentum. In return, Florges can heal their status conditions, preventing them from being worn down, as well as offer Wish support to make up for their lack of reliable recovery. Pursuit users in Choice Band Scizor, Mega Aerodactyl, and Krookodile make great partners as they can help trap and remove Gengar, which uses Florges as a free opportunity to wallbreak. It also takes pressure off Florges having to take on Latias, which it is unable to beat without Toxic. Water-types like Suicune and Mega Slowbro check threats such as Cobalion and Doublade that could use Florges to switch in to set up a Swords Dance while also appreciating Aromatherapy support from Florges. Hazard removal options like Tentacruel and Empoleon let Florges comfortably use Wish as its primary source of healing early-game than having to be overly reliant on Synthesis.