Suggestions by @KingGameRuler

Lisa Ortiz

as Korrina in Pokémon Adventures (Gym Leaders)

Donald Glover

as Grant in Pokémon Adventures (Gym Leaders)

Ryan Bartley

as Viola in Pokémon Adventures (Gym Leaders)

Zeno Robinson

as Marlon in Pokémon Adventures (Gym Leaders)

Clancy Brown

as Drayden in Pokémon Adventures (Gym Leaders)

Jackie Chan

as Brycen in Pokémon Adventures (Gym Leaders)

Erika Harlacher

as Skyla in Pokémon Adventures (Gym Leaders)

Kirk Thornton

as Clay in Pokémon Adventures (Gym Leaders)

Vanessa Marshall

as Elesa in Pokémon Adventures (Gym Leaders)

Matthew Mercer

as Burgh in Pokémon Adventures (Gym Leaders)

Brianna Knickerbocker

as Roxie in Pokémon Adventures (Gym Leaders)

Yvette Nicole Brown

as Lenora in Pokémon Adventures (Gym Leaders)

Tom Wayland

as Cress in Pokémon Adventures (Gym Leaders)

Lucien Dodge

as Chili in Pokémon Adventures (Gym Leaders)

Jason Griffith

as Cilan in Pokémon Adventures (Gym Leaders)

Roger Craig Smith

as Volkner in Pokémon Adventures (Gym Leaders)

AmaLee

as Candice in Pokémon Adventures (Gym Leaders)

Steve Blum

as Byron in Pokémon Adventures (Gym Leaders)

Travis Willingham

as Crasher Wake in Pokémon Adventures (Gym Leaders)

Erica Lindbeck

as Maylene in Pokémon Adventures (Gym Leaders)