Trade evolutions combine the hassle of items as well. I typically don't like item ones either, but for, say, Weavile, you have to grind for BP to get an item, and then trade it on top of that.
Edit: Let's use a better example, Metal Coat. x_X No metal coats.
Metal Coats can be easily obtained by wild Bronzongs and Magnetons though. Only the trade evo items that couldn't be obtained by wild pokemon at all are the biggest hassle. --- Freiza may be cool, but his brother is..... COOLER(get it?) 3DS FC: 0645-6947-9076 Steel Safari:Ferroseed,Fortress, and Klefki
You can farm the BP for trade evo items much faster than farming metal coats from magnetons in this game. Try it if you don't believe me. I did. x_X --- "Oh no! Three Adamantoises! Good thing I remembered my KNUCKLES." ~ Schesparn
Item-based trade evos. I have a lot of local friends who play pokemon, so trading was never much of an issue for me, except when items were involved. I don't know why, but I have always had difficulty finding the items necessary for item-trade evolution, especially in the earlier generations (I'm looking at you, Kingdra).
Affection, friendship and Pokémon Amie evolutions. Every other method on here is super quick and easy to do, the affection, friendship evos are just annoying and stupid. --- I understand much that understanding is not understanding so please understand not to understand, but to understand much when we must all understand please.