ok, here is a list of pkmn that can use those items to evolve. give them the item and trade it, it will evolve:
electrizer:electabuz-electravine
magmarizer:magmar-magmortar
protector:rydon-rypirior
reaper cloth:duskclops-dusknor
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put in Pokemon fire red and there will be a elekid with an electrizer in the valley wind works field.
You first have to upgrade to the national pokedex then go and catch elekid to get the Electrizer
If you have an electrizer you can use it to evolve electabuzz by letting electabuzz hold it and then trade it.
The electrizer on Pokemon Diamond is used by Electabuzz to evolve into Electivire. To get the electrizer in Pokemon Diamond you must have inserted Pokemon Firered in the game boy slot.
Electribuzz. Give your Electrizer and give it to Electribuzz and trade it and it will evolve into an Electivire