New category because I have like more than 150 OCS here, I will probably not list them all because I'm editing some of them + rewriting the giant AU

Kanto:

• Satoimo/Taro, Water-type GL (Gym Leader in Otoro)
• Shouma (prev: Aiko), Normal-type GL (Gym Leader in Otoro) Her name comes from Hitotsuba Shouma, Astilbe japonica
• Akira
• Hasu (Taro's mother) Her name comes from Nelumbo nucifera

Johto:

• Eli, Dark-type GL (Gym Leader in Otoro) her name means "elevated" or "high" as her circus artist status suggests

Hoenn:

• Shion, Flying-type E4 (Elite Four of Otoro) His name comes from Aster tataricus
• Prof. Matsumoto (Professor in Empenza) Her last name means place of the divine pine tree

Sinnoh:

• Ryuketsu/Noah, Dragon-type E4 (Elite Four of Otoro) His name comes from the dragon's blood tree, ryuketsuju
• Prof. Sakurakoji (Professor in Empenza) Her name means cherry blossom, her previous name was Sakuragi but I had to change it when Sakuragi came out in the Pokémon Journeys anime.
• Dango (Grimsley's ancestor, from Hisui) His name comes from dangleberry, accompanying Giima/Grimsley's pattern
• Oxydian/Odelia (Grimsley and Blanchard's mother) Her name is a mix between oxycoccus and the gem obsidian

Unova:

• Abigail, from Gila, genus of cyprinid fish
• Thomas, from τομη (tome) cutting or cleaving, περιτομη
• Britney
• Kristen "Kris", Risk
• Hakku/Ripley (Grimsley and Blanchard's father) His japanese name comes from Vaccinium huckleberry
• Ringo/Blanchard (Grimsley's older brother) His japanese name comes from Vaccinium lingonberry, Blanchard means bordering on white
• Gem/Jenna (Blanchard's daughter, Grimsley's niece) Her japanese name comes from Vaccinium corymbosum 'Georgia Gem' or simply from the word "gem" itself, Jenna means white shadow or Fair Phantom
• Tama/Lulu (Blanchard's ex-wife, Jenna's mother) Both her names mean "pearl"
• Dango (Grimsley and Cynthia's son)
• Drayna/Yarai (Drayden's daughter, Drayce and Drayton's mother)
• Drayce/Hanashobu (Drayden's elder grandson, Drayton's older brother)
• Joyce Joy (Cilan's wife)
• Zea (Cilan/Joyce's daughter)
• Grain (Cilan/Joyce's son)
• Edwin
• Anthony
• Barley
• Chiga/Georgia, Grass-type E4 (Elite Four of Otoro) Her name comes from Imperata cilindrica, chigaya in japanese, or Symphyotrichum georgianum
• Shiran/Nathan, Ice-type E4 (Elite Four of Otoro) His name comes from Bletilla striata, shiran (purple orchid)
• Diana
• Dokuga/Blair, supply E4
• Lorraine (Emily&Eleanor's mother)
• Savannah
• Malus/Malina, from the apple subtribe Malinae in the rose family (disguise name(s): Gina (as Aether Foundation disguise), Sumire (Blueberry Academy student disguise))

Kalos:

• R13: Rina from C. Tangerina/N-1030: Nora (Clemont's android)
• Amidon/Jean (Striaton Trio's father)
• Acheron (Alexander, Jordan and Helena's father)
• Lilium/Lirion (disguise name(s): Blanco (as Aether Foundation disguise), Lukan (Blueberry Academy student disguise))

Alola:

• Ike & Kei
• Rin
• Toma (Taro's father) Literally from tomato
• Fuku/Felicity, Fairy-type GL (Gym Leader in Otoro) Her name comes from Adonis amurensis, fukujusō

Galar:

• George (Emily&Eleanor's father), name from English Rose Teasing Georgia
• Barbora (George's mother), from Decumaria barbara

Paldea:

• Sierra
• Ava

Ferrum:

• Factory Head Namhae (from Namhae wild pear or spiraea)
• Arcade Star Seomsi (from Ulleungdo hare's ear)
• Palace Guardian Yeonri (from Venose vetch)
• Dome Superstar Hanrasan (from Hallasan azalea)
• Tower Tycoon Jangdae (from Maximowicz's berteroella)
• Salon King Taeksa (from Channeled water plantain)
• Arena Ace Geomun (from Geomundo false ohelo)

Otoro (based off Australia):

• Prof. Wattle
• Orville (Female protag Pokémon Opal)
• Wilbur (Male protag Pokémon Opal)
• Kibune/Jack, Rock-type GL, His name comes from Kibune giku, Anemone hupehensis var. japonica, after Mount Kibune
• Aka/JD, Fire-type GL, His name comes from Aka Shouma, Astilbe thunbergii
• Eric/Hector, Electric-type GL, his name comes from Ericaceae
• Leeth, former member of Team Innovation and Team Skull, his name comes from Heath
• Bana/Mandy, Champion of Otoro
• Bellatrix, Team Innovation Admin, her name comes from the Bucculatrix moth or the Amazon Star
• Yucca/Yulia, Team Innovation Admin, her name comes from the plant itself or the Yucca moth
• Hercules/Henry, Team Innovation Admin, his name comes from the Hercules moth, Henry comes from the first australian entomologist that described it

Kalidi (Abruzzo, Marche, Molise, Campania, Basilicata, Puglia, Calabria, Sicilia, Malta):

• Denji/Simon, Electric-type GL
• Rekka/Ignatius, Fire-type GL
• Clow, Fighting-type GL
• Sativus, Grass-type GL
• Tupelo, Psychic-type GL
• Curd, Poison-type GL
• Nyssa, Fairy-type GL
• Barbara D'Ursaring, Psychic-type E4 (Elite Four of Maneat)

Maneat (Papal State, mainly Lazio):

• Turlach/Terence, Both his names come from the lake Turlough (Male protag Pokémon Garnet)
• Shannon, from the river Shannon (Female protag Pokémon Garnet)
• Stella, Team Aestus Leader
• Laila, Dark-type GL (Gym Leader in South Kalos)
• Valeria Mareanie, Poison-type GL
• Ilary Blastoise, Dragon-type E4
• Alessia Maractus, Ground-type E4
• Taiga/Katrina, Dragon-type GL (Gym Leader in Kalidi)
• Milki Princesses:
  • Ines, Steel-type GL
  • Shailyn, Fairy-type GL
  • Kotori, Dragon-type GL
• Paolo Bonsly
• Luca Lurantis

Cannah (Veneto, Friuli, Trentino, Istria, Dalmazia, Montenegro, Albania, Peloponneso, Creta, Cipro):

• Abel
• Arturus
• Madara, Fighting-type GL
• Kale, Dark-type GL
• Kunal, Steel-type GL
• Wisteria, Ice-type GL
• Clove, Rock-type GL
• Myrthle, Dragon-type GL
• Parsley, Water-type GL
• Rue, Psychic-type GL

South Kalos (Southern France, Corsica, Piemonte, Toscana, Valle D'Aosta, Liguria, Lombardia):

• Terra
• Maria Decidueye, Champion of Maneat
• Federica Poochyena, Water-type E4 (Elite Four of Maneat)

Empenza (basically Paldea and Nusa region/Sardinia):

• Berna, Team Divine Leader
• Undha, Water-type GL
• Tirgu, Rock-type GL
• Wylan, Ground-type GL
• Leif, Fairy-type GL
• Shizue/Simanta, Ghost-type GL
• Sireli, Bug-type GL
• Hazel, Normal-type GL
• Artu, Flying-type GL

Ultra Space:

• Aisumo/Aito (member of Ultra Recon Squad), Aito means sea, ocean; Aisu - 愛 means "love, affection, fondness." and "mo" means star of the sea; or Alocasia 'Sumo'

Mixed relatives:

• Setsuna/Emily (Galar, Unova, Kalos), "setsu" theory, or Setsu Gekka Camellia, or Emily Chrysanthemum
• Kōkina/Eleanor (Galar, Unova, Kalos), Ghost-type GL (Gym Leader in Otoro) whole name Kokina yami, noble darkness, or Kokia kauaiensis, or Mimulus (Diplacus) 'Eleanor'
• Megairo/Jordan (Kalos, Unova, Galar), Leader of Team Innovation (in Otoro) from Magaera, the river Jordan and/or Hemerocallis Jordan
• Alecto/Alexander (Kalos, Unova, Galar) from Alecto, the city Alexandria and/or Lysimachia punctata ‘Alexander’ (Yellow Loosestrife)
• Tilphousia/Helena (Kalos, Unova, Galar) from Tisiphone, the city Helena and/or Helena Red Shades