Can someone give me a list of type boosting items (plates, charcoal, ect) & by how much they boost your move of that type.
Here they are, organised by the type it raises. They all raise the power of that type of move by 20%.
There are also Gems for every type (Normal Gem, Fire Gem etc), which raise the power of that type move by 50%, for one use only.
There are also orbs for specific Pokemon: