Weaklings choose the path of the gym leader. Cool cats choose the path of the champion. But anyway, I'd be the Dark type leader, since no one else is doing that. Probably late in the game, since if we've been waiting so long for it it better well be awesome. A team of Honchkrow/Weavile/Tyranitar with two spaces for new Pokémon, and a Greninja gets added for rematches (and Tyranitar will be able to Mega Evolve).
If I were to be a gym leader, I would run a Poison type gym, the seventh gym in the region.
When the trainer first arrives at the city, he sees a grunt from the region’s evil team running out, chased by a Salandit and an Ekans. Later on, an NPC tells the trainer the grunts often try to raid the city but the gym leader and her loyal battalion of Poison types keep them at bay.
When the trainer first arrives at the gym, the building doesn’t look like anything special, more of a small light brown hut than anything. The only thing really extraordinary about it are the Salandit and Ekans sitting in front of the door, the same ones from earlier. When the trainer approaches, you will have the choice to battle them, give them a Berry, or run. If you win or give them a Berry, they will allow you to enter.
Once inside, the gym will take on an ancient temple theme (much like those in archeological movies) with a warm brown color palette, several pillars with Ekans, Arbok, Seviper, Salandit, and Salazzle carved into them, rooms that get bigger and darker the farther the trainer gets into the gym, and of course traps. Near the doorway, the trainer finds a lady that tells them that several of the tiles in front of you hide nasty surprises but if they follow the pattern, they’ll get across safely.
The pillars will shoot flames that light up shapes on the tile, usually of various Poison types. If the trainer steps on a tile that’s not lit up, a battle will be initiated with either an Ekans or a Salandit. Once the trainer gets past the tiles, they will descend a flight of stairs to the next floor.
The next floor will be dimmer and bigger than the first and will be pretty much the same, just more tiles, a different pattern, and alongside the Ekans and Salandit, Spinarak, Ariados, and Seviper can spawn in the tiles not lit up.
The third floor is even dimmer than the last and has a moat around and under the tiles. Once again, the pillars will shoot flames to light up the tiles. Much like last time, if the trainer steps on a wrong tile, an Ekans, Salandit, a Seviper, a Zubat, or a Golbat will appear but this time there are several puddles of water that the trainer will occasionally have to walk through which will trigger a Skrelp or a Mareanie to appear.
The fourth floor will be the darkest and hardest to navigate. When the trainer first arrives, it is completely dark until they step on something which triggers a battle with a Golem. Once the Golem is defeated, the tiles will be lit up into the hardest pattern yet. If the player steps on a wrong tile, either an Ekans, a Salandit, a Spinarak, an Ariados, a Seviper, a Zubat, a Golbat, or a Graveller will appear. On the last line of tiles, none of them will have been lit up and the trainer will have to walk on them to proceed. This will initiate a battle with a Nidoqueen. Once the trainer defeats the Nidoqueen, a doorway will open in the wall and they will proceed through it down a hall lined with torches and Salandit until they reach the gym leader.
My gym team would be: Salazzle: My ace Pokémon. Moveset: Captivate, Venoshock, Flame Burst, Dragon Rage Arbok: Moveset: Wrap, Crunch, Venoshock, Toxic. Nidoking: The first Pokémon to be used. Moveset: Horn Drill, Megahorn, Toxic Spikes, Earth Power. Mareanie: Moveset: Bite, Spike Cannon, Recover, Poison Jab.
I've got a few different mono teams (Water, Ghost, Ground, Dragon and Dark) but typically I gravitate to Ghost & Water. And just to be different, I choose Ghost If I was a Ghost Gym Leader, I would use the Ghost Team I used in Gen IV (see below).
Both the Gen IV regions have Ghost Gyms already, so whilst I love Sinnoh, me and my fiendish friends would spread our wings and set sail to the Kanto region. I heard the Viridian Gym Leader left to run a battle facility for advanced trainers in a far off region, so there's I'm sure there's room.
I'd love a gym in Lavender town, but it doesn't feel very respectful to build one there. So instead I built one on Three Island, in the gorgeous Sevii Isles. Sevii isles 1 - 3 are accessible after the 7th Badge, so that would make me the 8th gym leader.
An experienced coordinator in my home region of Sinnoh and superfan of Fantina, I wanted to bring the joy of contests to Kanto too. As such, on arrival at the Sevii Islands, I took over the disused Game Corner on Two Island, which had been closed down due to anti-gambling laws, and converted it into Kanto's first and only Super Contest Hall (no contest pass required). A teenage Lostelle (who sometimes appears in the contests with her Hypno) and her elderly Dad run it. I then set up my gym on Three Island.
However, My gym cannot be challenged straightaway--instead, they find Three Island is overrun with the members of an upstart, local gang, who've stolen almost all the townsfolk's Pokemon! To restore peace and continue their Gym challenge, the player must battle their way to the heart of the Berry Forest where the local gang's headquarters are. There they'll find me locked in a triple battle with three grunts who're, the boss' last line of defence, exhausted, nearly overcome after having battled my way there too. Whilst I occupy the grunts, the player is free to fight the boss. When they win, order restored, and I tell the player to find me at my gym when they're ready before leaving to escort the evil team leader to the nearest Officer Jenny. On my way out I give them a Poffin Case as thanks.
After the player beats me at my gym, I will sometimes compete alongside the player in the Master Ranks of any Super Contest category. My gym has no trainers and I can be challenged in the first room (its new). Aside from distributing the 8th badge, the Promise Badge (the design would be two hands holding, one white and one black) I would also give TM30, Shadow Ball, to those who defeat me. My badge would allow the user to use HM09, Dive (and fortunately there would be a new area beyond the Berry Forest that has been opened up recently, which allow access to some dive pools). It would also increase the contest stats/condition of a player's Pokemon by a small amount.
Post-game my gym would be much improved. I've now recruited 3 gym trainers, and added three more floors to my gym (under ground), but idk what the puzzle would be. Probably some sort of door warp puzzle. I will also have a postgame appearance at Viridian Forest; when the player arrive, I talk about the habitat loss caused by the deforestation that has occurred there, and how I came to quell the angry spirits of the Pokemon that perished there as a result, using a special ritual passed down thru the generations of my home region. I give the player an Odd Keystone, and suggest they might want to take it to Altering Cave before flying away on Zeus, my Drifblim. Once the player has connected with 32 people via wifi / internet, a Hallowed Tower will appear in Altering Cave, where they may release the spirits I trapped in the Odd Keystone as a Spiritomb and capture it.
My character model would be bald head with a flatcap, black beard, a loose, shiny pink jacket with gold sparkles over a white shirt, black three quarter jeans, sandals, and sunglasses. I'd also be holding a chocolate frappe and maybe a little jewelry, like an ear stud. My dialogue would be scattered with small amounts of Esperanto word replacements (hi ---> saluton, bye -----> adiaux, etc).
Yes, I am one of those disliked leaders with only three Pokemon to their name.
My gym is just an ordinary house. Well, except for the fact that it's deep inside the rather creepy woods near the village. All you have to do to reach my house is to walk through it! It has a bunch of possessed trainers who will chase you around the maze-like forest! Make sure you defeat all the normal picknickers within a certain turn limit, or they might catch up to you...
I would have a ghost gym based on a haunted castle. The puzzle would be a run-of-the-mill teleporter puzzle like Sabrina's or Olympia or like a big, dark maze and trainers waiting at the dead ends. I'd like it to be middle game, like the 4th or 5th gym.
My pokemon would be
Trevenant, Golurk and Aegislash (ace)
In a rematch it would be: Chandelure, Mismagius, Gengar, Golurk and Aegislash.
I'd hand out Shadow Ball TM
I'd be a ghost-type gym leader who uses only the cute/silly ghost types. I talk exclusively through hand puppets.
Blacephalon (yes, an ultra beast, but it's also a silly clown)
I would likely be an early/mid-game leader just based on this roster.
The gym puzzle would involve the player trying to act out little scenes in front of some kids in a small theater, and would work a bit like Blaine's gym with its quiz show. The gym trainers will give you instructions on how to act out the scene in question, and choosing the incorrect option during your performance will result in a battle. The final scenario ends in a battle with me. Badge would be something like the Trickster Badge, and I'd give out Shadow Claw as a TM.
well Id be a grass type gym, somewhat around the 5th gym. My relevancy would be you first meet me around the 3rd gym chasing off some ET goons. Id just say see me when you reach 4 badges. Once you enter the gym, it has a jungle like feel. You would have to traverse through vines, trees, bridges, and other hazards. This would require Cut and Rock Climb to traverse. The trainers have mons like Swadloon, Tangela, and Ivysaur. A total of 10 trainers need to be beat before I can be faced. My team would consist of a
Level 38 Leafeon, with Swords Dance, Take Down, Leaf Blade, and Iron Tail, with a Sitris Berry
Level 40 Ferrothron, With Stealth Rock, Power Whip, Spikes, and Leech Seed, and a Rocky Helmet
Level 40 Ludicolo, with Rain Dance, Blizzard, Surf, and Giga Drain, with Leftovers
Level 43 Lurantis, with Solar Blade, X Scissor, Synthisis, and Swords Dance, with a Power Herb
I'd run a normal type gym based off of a forest and food. The puzzle would be trying to make soup that the Munchlax that i would own who's quite picky would like. I haven't thought of what the Munchlax would like, but if you make a soup that the Munchlax didn't like, you'd have to battle an evolved normal type like Delcatty or Furret. The trainers in my gym which are optional would have pokemon like Slakoth and Helioptile. My team would consist of:
A Bewear with Hammer Arm, Superpower, Flail, and Double Edge.
A Zangoose with Swords Dance, Close Combat, Slash, and Crush Claw.
A Heliolisk with Parabolic Charge, Thunder, Quick Attack, and Return.\
My ace Snorlax with Rest, Hyper Beam, Body Slam, and Outrage
I would be an Ice-type Gym Leader in Hoenn in a similar style to Giovanni using his Gym has a cover for Team Rocket, I'd use my Gym as a cover for my fantasy evil team, "Team Glacier", which I used as my secret base in Omega Ruby near Shoal Cave. I don't know where I'd put the Gym since Mossdeep is the most fitting location but is taken, maybe I can do it there anyways in a rivalry style similar to Saffron having the Fighting Dojo and Sabrina's Gym. If not, I'd locate it in Lilycove. My team would depend on how many badges a challenger had, which has been shown to be what happens several times. Levels are based on ORAS Gym Leaders, being my most recent reference to Hoenn.
I would give away the TM of Hail or Blizzard, as I would use both regularly on my entire team since I would always open with a Snover or Abomasnow that causes Hail. Castform would for sure know Hail because by the time Castform comes out, the Hail from Snover/Abomasnow could be gone.
If I were to be a Gym Leader, I would be a Dragon-type Gym Leader. The motif I would do is one of those stories of a knight saving a princess from a dragon's clutches. As such you will be required to defeat some Dragon Tamers in battle, after doing the required battles, you will meet a female NPC in a princess's outfit at the back of the Gym after defeating said Dragon Tamers in battle. That NPC will give you a key that will take you to a throne room filled with false gold to emphasize the dragon's behavior of gathering huge treasure hoards. You will find me in a knight's outfit, being impressed that you have made it this far, but telling you that this is the toughest Gym challenge you will face before going to the league. My team will be:
Haxorous, level 46
Hydreigon, level 49
Kommo-o, level 47
Dragalge, level 48
As you might have guessed, this would be the last Gym you would challenge, as all four Pokemon would also have offensive Steel and Poison-type moves like Iron Head and Poison Jab. The held items they would hold would boost their coverage moves as well, so yeah, don't try to think this will be easy with Fairy types. Upon my defeat, I would give you the TM that contains Outrage, giving you the explanation that it's a powerful, but also risky move to use.
I'd run a Dark-Type Gym. My gimmick would be a puzzle themed Gym. The area is entirely in darkness. There would be a large room with three paths branching off of it, each with a single light hanging above them, and a podium with a small light above it. The podium would give you a question and if you get it right, it will light up the correct path to move on. If you get it wrong, the paths will remain dark and you'll have to use trial and error to find your way. The false paths will have one of my trainers in them at just the right position that they don't give away the correct path. After finding the correct path, you will arrive in another large room in the same manner and will repeat the process. There will be a total of three large rooms and I will be located at the end of the third rooms correct path.
My team would be Umbreon, Honchkrow, Zweilous, and Absol which can Mega Evolve given the game has the feature. I would be the 7th Gym Leader in my region as well.