So yeah, with the confirmation of passing DW abilities:
http://www.smogon.com/forums/showthread.php?t=79340&page=10
Raichu can now abuse Encore + Lightningrod.
I'm thinking Raichu should run this set in the new OU standard.
Raichu @ Life Orb
-Agility / Nasty plot
-Encore
-Electra Ball
-Focus Blast
The trick is to switch into an electric type move and encore said move (or a move that doesn't harm you) if they stay in you get
2+ Special attack, and a free turn to use agility. Electra Ball is going to definetely hurt when Raichu reaches 656 after an agility boost. Focus Blast is basically a necessity in gen 5, especially with Nuttre lurking around every corner and the coverage with Electra Ball is good.
Best of all, he's the only one who can pull this off. No other electric type can do this!