If you catch a buttload of Chansey, one of the rarer items they have is a Lucky Egg, which increases EXP gain (it stacks with the EXP bonus from having secondhand pokes!). I got a friend to trade with me so I could get one because I didn't have the patience to catch a bunch of Chansey, and also so I could evolve my Graveler. If you want, maybe I could find a WiFi spot and pass mine on to you at some point?

Luxray ARE awesome, not gonna lie. Mine one-hitted Cynthia's Milotic o' doom that ettezag was talking about up there. Adamant nature + Rivalry = huge boost to Thunder Fang, provided the opponent is the same sex as the attacking Luxray (I know Intimidate is more reliable, but it doesn't help to reduce the attack of a defense-specialist poke!).