Lightball
No they can't.
You have to make it hold the item ELECTIRIZER and trade it.
When looking at the item, it does say "a Pokemon loves this item". It is a hint to give a Pokemon that item. Well that Pokemon is a rhydon. Give a rhydon that item to hold. Trade it and see what happens...
get the protector item and make your rhydon hold it and then trade and bammmm! you have one.
There's no such item/pokemon. Do you mean Giratina?
give the item to a Pokemon and then trade that Pokemon.
Get a Pokemon that knows thief. Find a spot where a lot of Pikachu are. When in battle with Pikachu, use thief and if they don't have a item, run away from that battle. Keep doing that and sooner or later you will find a Pikachu with a light ball. I hope I helped :)
let him hold a thunderstone(in the bag) and go into the luminous cave and say yes to item
the fist plate on rt. 215
No wild Pokemon hold the item razor claw but you can find razor claw at Route 224, Victory Road and available to buy at the Battle Tower (D/P) -Clensen
Pikachu. I'm pretty sure you need to attach an item to Pikachu to breed Pichu.
The only Pokemon who learns it is Rhyperior (lv 61). You get him by trading a Rhydon to a friend with the hold item Protector attached.