Notes befor story
Pokémon the King of Pokelantis uses: Spiritomb, Ninetails, Jynx, Dusknoir, Shedinja, and Stantler
Aura's Pokémon: Chimchar, Chikorita, Eevee, Froslass, Spiritomb, and
Ash's Pokémon: Pikachu, Monferno (that later some how re-evolves back in to Chimchar again), Buizl, Gliscor, Grotle, Staravia, and Riolu (Riolu does not have a Pokéball so it can travel with Ash)
Anabel's Pokémon: Espeon, Leafeon, Cubone, Kirlia (later evolves into Gardevoir), and Ninetails
Brock Pokémon: Sudowoodo, Croagunk, and Happiny
Dawn Pokémon: Pachirisu, Piplup, Poleswin, Mawile, and Buneary