Shiranui entered the field of Hulbury Stadium to a thunderous roar from the crowd.  He wore a Ghost Uniform he purchased from the local uniform shop.  Nessa was on her side of the battlefield.  "Welcome, honored Gym Challenger!" Nessa greeted, "No matter what kind of plan your mind may be plotting, my partner and I will be sure to sink it."
"What's sinking is the probability of you defeating me in battle," Shiranui rebutted as the jumbotron lit up to show Nessa and Shiranui's faces with three blank circles next to each of the battlers.

"We'll be using three Pokémon here," Nessa stated, "Go Goldeen!"
"Sogekishu, I choose you!"  Nessa sent out her Goldeen and Shiranui sent out his Sobble.
"Goldeen, Agility!"
"Sogekishu, Mud Shot!"  Shiranui's Sobble threw a gob of mud at Goldeen and landed a hit that slowed the goldfish down before Goldeen became more agile.
"Goldeen, Horn Attack!"
"Sogekishu, Mud Shot once more!"  Goldeen charged at Sogekishu and struck a piercing blow.  Sogekishu got up and threw another mud pie at Goldeen, leaving Goldeen muddy and slowed down to normal speed.
"Goldeen, Supersonic!"
"Sogekishu, Swift!"  The Sobble jumped into the air and performed a series of forward somersaults, launching a salvo of star-shaped projectiles at Goldeen.  Goldeen was inundated and went down.
"Goldeen is unable to battle, Sobble wins!" the Rotom Ref called and Sogekishu was jumping for joy before letting off a glow of bright white light, gaining 40 cm in height.  The glow subsided to reveal Sogekishu as a Drizzile.  Shiranui quickly scanned Sogekishu with his Rotom Phone.
"[i]Drizzile, the Water Lizard Pokémon.  A Water type and the evolved form of Sobble.  A clever combatant, this Pokémon battles using water balloons created with moisture secreted from its palms.[/i]"

"Goldeen, return; go Arrokuda!"  Nessa switched her downed Goldeen for a far more streamlined fish that Shiranui scanned.
"[i]Arrokuda, the Rush Pokémon.  A Water type.  If it sees any movement around it, this Pokémon charges for it straightaway, leading with its sharply pointed jaw.  It's very proud of that jaw.  After it's eaten its fill, its movements become extremely sluggish.  That's when Cramorant swallows it up.[/i]"
"Arrokuda, Bite!"
"Sogekishu, Double Team!"  The newly-evolved Drizzile put his high speed to work and generated numerous copies.  Arrokuda charged at one of the copies and bit down, causing the Drizzile it targeted to vanish.
"Bite once more!"
"Sogekishu, Aqua Ring!"  Sogekishu conjured a thin watery veil that would slowly recover his health while Arrokuda charged in and bit down on what turned out to be the real Sogekishu, scoring a critical hit and knocking the Drizzile out.

"Sogekishu, return; Nekomata, I choose you!"  Shiranui switched out his downed Drizzile for his Espurr.
"Arrokuda, Bite!"
"Nekomata, Thunder Wave!"  Arrokuda charged at Nekomata and the Espurr floated out of the way before paralysing Arrokuda.
"Try another Bite!"
"Nekomata, Psybeam!"  Nekomata followed up by firing a beam of psychic energy and blasting Arrokuda for major damage.  Arrokuda was too paralysed to charge for another Bite.
"Arrokuda, Aqua Jet"
"Nekomata, Psybeam once more!"  The Espurr fired another Psybeam and blasted Arrokuda with enough damage to knock the barracuda out.  Nekomata let out a joyful mew and like Sogekishu before her, started glowing with a bright white light.  Nekomata grew a foot before the glow subsided to reveal a female Meowstic.

"Arrokuda, return.  Looks like I'm down to one last Pokémon. I've been saving the best for last!  Go Drednaw!"  Nessa swapped her downed Arrokuda and sent out her headliner Drednaw.  "Flood the stadium and make it our ocean! Drednaw, time to Dynamax!"
"You too, Nekomata!"  Both Nessa and Shiranui returned their Pokémon and using their Dynamax Bands, threw their enlarged Poké Balls into the battle like soccer players performing a throw-in.  Both Poké Balls opened to reveal Drednaw and Nekomata in their Dynamaxed states.
"This is a little gift from us…I hope you can take it!  Max Geyser!"
"Nekomata, use Max Overgrowth!"  The newly-evolved Meowstic channelled the power of her Magical Leaf into the Dynamax move, causing giant mushrooms to grow around Drednaw and explode with enough energy to turn the battlefield into Grassy Terrain.  Drednaw copped heavy damage and barely survived before launching a massive stream of water at Nekomata.  Nekomata was buffeted by the water and so much water was launched into the air that it started raining heavily as if the move Rain Dance had been used.
"Drednaw, use Max Darkness!"
"Nekomata, finish it off with Max Mindstorm!"  The enormous Meowstic unfolded her ears, exposing the eye-like patterns and unleashed her psychic power in the form of large ripples of psychic energy that bombarded Drednaw.  Drednaw couldn't take the onslaught and thus fell over, reverting to its normal size.
"Drednaw is unable to battle," called the Rotom Ref, "The winner of this battle is Shiranui Tsukiko of Ecruteak City!"

"I may proudly be the strongest member of this Gym, but I was totally washed away!" Nessa commented, "You have an incredible spirit that may even be strong enough to challenge the Champion and in commendation of your spirit and your victory, I award you with the Water Badge."
"Thanks Nessa," replied Shiranui.
"You'll want to challenge the Motostoke Gym Leader next," advised Nessa, "As you and your Pokémon are now, he'll definitely want to battle you."
"Duly noted," Shiranui acknowledged.