Yeardley received Oddish some time in Kanto and was brought to Hoenn, she evolved into Gloom to protect Yeardley and Cody, Gloom wanted to evolve but she cant decide what to become, Cody suggested placing a Sun Stone and a Leaf Stone to let Gloom decide, after giving it some thought, she evolved into Bellossom and later gave the Leaf Stone to Cody so he can get a Pokemon to evolve from it. Bellossom's known moves are Leaf Blade, Petal Dance, Energy Ball and Moonblast, and her ability is Chlorophyll.
Yeardley caught Poliwag during her time in Kanto and was brought to Hoenn, he evolved into Poliwhirl during her time in Kanto. Poliwag's known moves are Hydro Pump, Double Slap, Ice Beam and Rain Dance, and his ability is Water Absorb.
Yeardley received Turtwig from Professor Rowan, he is very friendly and a little protective with his Trainer. He appeared alongside Vullaby and Yeardley where he battled against Sophie but despite battling valiantly, he defeated Piplup before falling to Noibat. He later evolved into Grotle during her travels and receiving the Forest Badge prior to it. He evolved into Torterra during the Pastoria Gym. His known moves are Giga Impact, Razor Leaf, Earthquake and Energy Ball, and his ability is Overgrow.
Yeardley used Vullaby in her battle against Sophie, She battled well but she fainted to the recoil damage and tied with Noibat, resulting a draw. During the battle against Fantina, she evolved into Mandibuzz and learned Bone Rush in the progess. Her known moves are Brave Bird, Dark Pulse, Punishment and Double Team, and her ability is Overcoat.
She debuted as a Snorunt where she and Yeardley encountered Cody with his Misdreavus who had yet to evolve, Yeardley offered Cody a Dusk Stone which he accepts to evolve his Misdreavus into a Mismagius. She was revealed to have evolved into Froslass during the Sinnoh League. She put up a good effort against Leaf's Rampardos, but she was defeated by Head Smash. She was brought back to the team during her time in Hoenn as a mentor for Yeardley's new teammates who were just rookies. She took part of the Fallabar Town Contest where she was defeated in the finals. She was revealed to have resided at Isabelle's Ranch after the Battle in Lavaridge. Her known moves are Ice Beam, Hail, Shadow Ball and Destiny Bond, and her ability is Snow Cloak.
Yeardley used Shroomish in her battle with Cody in Lavaridge City where she was training her team, during the battle, Shroomish evolved into Breloom and learning Sky Uppercut in the process which she used to defeat Cacnea with ease. Breloom's known moves are Headbutt, Seed Bomb, Drain Punch and Leech Seed, and her ability is Poison Heal.
Yeardley used Whismur in the Fallabar Town Contest where she dazzled the audience with her Attract-Flamethrower combo allowing her to move on to the Contest battles. At some point, she evolved into Loudred. She revealed to have evolved into Exploud which it was used in the Double Battle against a Random Trainer and won with its teammate Minun. Exploud's known moves are Flamethrower, Boomburst, Surf and Hammer Arm, and her ability is Soundproof.
Minun's known moves are Iron Tail, Metronome, Thunderbolt, Electro Ball and his ability is Minus. Minun has used Flying Press, Moonblast, Dark Void, Oblivion Wing, Core Enforcer, Splash, Flamethrower, and Roar of Time via Metronome.
Yeardley obtained Anorith when it was revived from the Claw Fossil she had. It was later revealed to have evolved into Armaldo which it was used in the Grand Festival in the Appeal Round and which was able to advance to the next round. Armaldo's known moves are X-Scissor, Stone Edge, Earthquake and Swords Dance, and his ability is Battle Armor.
Yeardley's starter in Hoenn, He evolved into Marshtomp during her time in Hoenn. He was used against Cody but lost. During the Mossdeep Gym arc, Marshtomp was revealed to have evolved into Swampert and can now use Mega Evolution. Swampert's known moves are Water Gun, Mud Shot, Tackle, Scald, and his ability is Torrent.
Yeardley used Slugma in her battle against Cody but was quickly defeated by Mismagius. It was later revealed to have evolved into Magcargo which it was used in the Lillycove Contest. Magcargo's known moves are Flamethrower, Reflect, Stone Edge, Body Slam, and his ability is Flame Body.