Nagisa/Cure Black and Honoka/Cure White are the first characters that got their own English dub (Natalie Blackstone and Hannah Whitehouse).
They are most likely more common to appear in the Sailor Moon's Adventures series while Natalie and Hannah appear in the Pooh's Adventures series along with Shauna, Rina, Alex, Nickie, Fergie, Kossner, Mepple, Mipple, Porun and Wisdom.
In 2004 started with the first season called Futari wa Precure along with Tokusou Sentai Dekaranger (aka Power Rangers S.P.D.) in the same year.
Their 1st spinoff Adventure will be Pretty Cure All Stars Adventures of Once Upon a Forest.
All English names used with the Japan-exclusive Pretty Cure teams are courtesy of the Pretty Cure fandubs, dedicated to "Dub Pretty Cure into English".
Gallery
All the Pretty Cure Warriors
Pretty Cure All Stars
The Max Heart Pretty Cures (Cure Black, Cure White and Shiny Luminous)
The Splash Star Pretty Cures (Cure Bloom and Cure Egret)
The Splash Star Pretty Cures (Cure Bright and Cure Windy)
The Pretty Cure 5 Team (Cure Dream, Cure Rouge, Cure Lemonade, Cure Mint, Cure Aqua and Milky Rose)
The Fresh Pretty Cures (Cure Peach, Cure Berry, Cure Pine and Cure Passion)
The Heartcatch Pretty Cures (Cure Blossom, Cure Marine, Cure Sunshine and Cure Moonlight)
The Suite Pretty Cures (Cure Melody, Cure Rhythm, Cure Beat and Cure Muse)
The Smile Pretty Cure/Glitter Force (Cure Happy/Glitter Lucky, Cure Sunny/Glitter Sunny, Cure Peace/Glitter Peace, Cure March/Glitter Spring, Cure Beauty/Glitter Breeze and Cure Echo/Glitter Shine)
The DokiDoki! Pretty Cures (Cure Heart, Cure Diamond, Cure Rosetta, Cure Sword and Cure Ace)
The Happiness Charge Pretty Cures (Cure Lovely, Cure Princess, Cure Honey and Cure Fortune)
The Go! Princess Pretty Cures (Cure Flora, Cure Mermaid, Cure Twinkle and Cure Scarlet)
The Maho Girls Pretty Cures (Cure Miracle, Cure Magical, Cure Felice and Cure Mofurun)
The Maho Girls Pretty Cures (Ruby Style)
The Maho Girls Pretty Cures (Sapphire Style)
The Maho Girls Pretty Cures (Topaz Style)
The KiraKira Pretty Cure a la Mode Cures (Cure Whip, Cure Custard, Cure Gelato, Cure Macaroon, Cure Chocolate and Cure Parfait)