As the name suggests this is a list with some of the main villains in the story, so let's-a-go!

Name: Hela
Role: Big Bad, basically Salem from RWBY
Partner: Giratina

Team Ember: The equivalent to Team CMEN for the book, the four members are:

Name: Azula
Role: The equivalent to Cinder Fall obviously being the crazy fire girl
Partner: Chandelure

Name: Ezekiel 'Zeke' Stane
Role: The same as Mercury Black
Partner: Electrode

Name: Selina Kyle
Role: Same as Emerald
Partner: Alolan Meowth

Name: Rose Wilson
Role: Same as Neopolitan
Partner: Doublade

Other than Team CMEN, there is also an equivalent to Roman Torchwick:

Name: Slade Wilson
Role: Same as Roman Torchwick, except Roman may or may not have been romantically involved with Neo (it was never made clear) while Slade is Rose's father
Partner: Greninja

Of course there are other villains but right now i want to show a more unique group of villains, behold, the Wild Pack, a team formed of only animal-themed villains

Their Leader:

Sauron
Animal Motif: pterosaur
Partner: Aerodactyl

Other Members:

Rhino
Animal Motif: A rhino
Partner: Rhydon

Killmonger
Animal Motif: A pantera genus feline
Partner: Luxray

Killer Croc
Animal Motif: Crocodile
Partner: Krokodile

Black Manta
Animal Motif: Manta Ray
Partner: Mantine

Vulture
Animal Motif: a Vulture
Partner: Mandibuzz

Man-Bat
Animal Motif: Bat
Partner: None, is not sentient enough to command a pokémon

Penguin
Animal Motif: Main one is a penguin but overall it's birds in general, mainly semi-aquatic birds
Partner: Empoleon

Venom5225
SONOW0409
DreadfulCypher09
SailorTheia_
WebKiller2
WebKiller4
pkmnmasterblue
williamsmaurice1254