Gallade. It's an awesome male counterpart to the feminine Gardevoir, and I love how it looks like a knight or gladiator (though Gardevoir's original name could be transliterated to 'Sir Knight', ironically enough). Another weird thing is that when I heard Gallade's original name 'Erureido', it sounded to me like 'Air Raid'. As a kid, the sound of air raids was something that creeped me out more than anything. I would have nightmares of them. Then Gallade, a Pokemon that I loved on first sight, kinda took that fear away because now I could attribute the thought of air raids to something else, namely its cry and battle animation, which are awesome especially when they're synced like how they were in older games (fwip...SHING!). So, to me, Gallade sorta represents a mixture of a gladiator, knight, protector, and a prince (especially now that he has a cape).
Darkrai, Shaymin, Munchlax, and Drifblim are some of my other favorites, but Gallade is definitely the best.