I noticed that some of the teams of the gym leaders and élite 4 members aren't very good, so I decided to change them, with the help of this video. The order of the teams will go from top to bottem.

Gym Leaders -

Katy's Team :

- Spidops

- Vespiquen

- Frostmoth

- Volcarona

- Lokix

- Bug Tera Ursaring

Brassius's Team :

- Arboliva

- Leafeon

- Brambleghast

- Meowscarada

- Scovillain

- Grass Tera Sudowoodo

Iono's Team :

- Kilowattrel

- Magneton

- Bellibolt

- Luxray

- Jolteon

- Electric Tera Mismagius

Kofu's Team :

- Pelipper

- Veluza

- Wugtrio

- Tatsugiri

- Clawitzer

- Water Tera Crabominable

Larry's Team :

- Komala

- Herdier

- Dunsparce

- Gumshoos

- Slaking

- Normal Tera Staraptor

Ryme's Team :

- Houndstone

- Skeledirge

- Goldengo

- Gimmighoul

- Sableye

- Ghost Tera Toxtricity (Low Key Form)

Tulip's Team :

- Espathra

- Gothitelle

- Farigiraf

- Gardevoir

- Hatterene

- Physic Tera Florges

Grushra's Team :

- Frostlass

- Vanilluxe

- Cetitan

- Beartic

- Avalugg

- Ice Tera Altaria

Team Star Bosses -

Giacomo's Team :

- Bisharp

- Mabosstiff

Mela'a Team :

- Torkoal

- Female Salandit

- Armarouge

Atticus's Team : 

- Ariados

- Glimmet

-  Toxicroak

- Grafaiai

Ortega's Team :

- Klefki

- Mimikyu

- Dachsbun

- Tinkatuff

Eri's Team :

- Hawlucha

- Lucario

- Pangoro

- Annihilape

Academy Teachers - 

Jacq's Team :

- Maushold

- Dunsparce

- Farigiraf

- Toedscruel 

- Wugtrio

- Rotom

Dendra's Team :

- Blazing Breed Tauros

- Falinks

- Medicham

- Passimian

-  Mienshao

- Quaquaval

Nurse Miriam's Team :

- Miriam

- Comfey

- Indeedee

- Blissey

- Audino

- Arboliva

Raifort's Team :

- Gengar 

- Spiritomb

- Cofagrigus

- Zoroark

- Oricorio

- Ceruledge

Saguaro's Team :

- Wigglytuff

- Appletun

- Leavanny

- Alcremie

- Goodra

- Dachsbun

Salvatore's Team :

- Alolan Raichu

- Alolan Exeggutor

- Galarian Weezing

-  Perrserker

- Aqua  Breed Tauros

- Clodsire

 Tyme's Team :

- Mid Day Lycanroc

- Midnight Lycanroc

- Barbaracle

- Stonjourner

- Garganacl

- Klawf

Director Clavell's Team :

- Polteageist

- Oranguru

- Abomasnow

- Drampa 

- Rabsca

- Quaquaval

Elite Four -

Rika :

- Sandaconda

- Whiscash

- Flygon

- Toedscruel

- Clodsire

- Ground Tera Gallade 

Poppy :

- Bronzong

- Scizor

- Copperajah

- Orthworm

- Tinkaton

- Steel Tera Golurk

Larry's Team :

- Staraptor

- Talonflame

- Kilowattrel

- Flamingo

- Coviknight

- Flying Tera Dudunsparce

Hassel's Team :

- Hydreigon

- Dragalge

- Cyclizar

- Salamence

- Haxorus

- Dragon Tera Lapras

Champion Geeta's Team :

- Glimmora

- Espathra

- Garganacl

- Armarouge

- Baxcalibur

- Kingambit

Rivals -

Nemona's Team :

- Pawmot

- Kommo-o

-  Garganacl

- Ceruledge

- Veluza

- Meowscarada

That's all the changed teams.