I use my Krokodile for a Electric/psychic sweep, so no covering weakness'
item:Expert Belt- Adds some power to those attacks on the electric/psychic pokemon, plus makes up a bit for non-stab moves like smackdown/stone edge on flying pokemon
nature:Adamant(ups attak, doesn't need sp.atk anyway)
ev:252 attack, 130 speed 32 defence 32 sp.defence
everything you can put into attack, some speed because you always want to hit first, and some defence because you'll most likely be switching him in, and he may need to be able to take a hit or two.
bulk up/hone claws- both up attack, but hone claw is useful if you have a move like stone edge, gives you a bit of Accuracy, bulk up i would use, just for the boost of defence.
smack down/stone edge-with the quite popular Eelektross and Emolga, and the new (annoying) air balloon item, this can be quite useful. if you want something different, you can go for stone edge, fairly strong and decent Accuracy if you pair it with a few hone claws