I've got two:
Medicham @Leftovers
Adamant nature
Evs: I forgot what EVs I gave it...
~Brick break
~Baton pass
~Bulk up
~Calm mind
My Leaf Green baton passer, it works well IMO. It can baton pass attack, defense, sp.attack, and sp.defense, so basically every stat except speed. But since the majority of my pokemon are really slow (aggron, steelix,ect.) anyway, it wouldn't make a big difference.
Scizor @Leftovers
Adamant nature
EVs: ^See above^
~Silver wind
~Swords dance
~Iron defense
~Baton pass
I really love this thing. It's good at baton passing attack and defense, and if silver wind ever lands that all-stat boost....
One helluva baton passer.