Ever heard of an anime called Digimon? xD
No, seriously. Take a look.
First & Second Saga (which are heavily connected story-wise)
Gold/Davis is hotheaded and impulsive, looks up to Red/Tai (who is the leader of the first set of characters), and is friends with Silver/Ken, who has a sensitive past and an affiliation with darkness. Gold/Davis is connected with fire and electricity - Explotaro/Flamedramon and Pichu/Raidramon. And he wears goggles.
Crystal is kinda like a blend between Yolei and Cody, with more of Yolei's characteristics (weird family issues...) and most of Cody's personality (SERIOUS.)
Yellow is a mix of TK and Kari - young at heart, innocent, has a power that sets her apart from the other 'Dex Holders, a Pokemon that bears a passing resemblance to Patamon...
Third Saga (which references the first/second, but doesn't actually connect with them)
Ruby is like a mix of Takato and Henry (doesn't like to battle, hidden power he doesn't often wield, something of a wimp, notable father), and Sapphire is such a Rika that it's hard not to see it(not afraid to beat people up). @_@ Wallace reminds me of Henry too, but his Pokemon remind me of Kenta. Wally has Kenta's personality, though.
And the color affiliations match Ruby and Sapphire with Takato and Rika beautifully.
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I imagine epic crossovers...