Wondertrade general.
Time to do God's Work lads.

Let's have a crack at a tier list.

God's Work Tier:
Shinies
Legendaries

Top tier:
Bred rare Pokemon [Whether for moves, IVs, natures]
Item-trade evolving Pokemon

High tier:
Rare Kalos Pokemon [Goomy, Hawlucha, Noibat, etc]
Regional ditto
Starters
Version exclusives

Mid tier:
High level common route Pokemon
Trade evolving Pokemon
Funny nicknamed Pokemon

Low tier:
Low level/early game uncommon mons [Honedge, Skiddo, Espurr, etc]
Scaterrbug lines

Bottom tier:
Shitmon [Bunnelby, elemental monkeys, Pikachu, Fletchling, Pidgey, the usual suspects]

Imagine this /vp/.
You trade your cool ass semi-rare Pokemon. You get matched up with some Jap retard who trades you some Bunnelby in return.
You're pissed right?
But at the other end of that trading line is some Japanese 10 year old school kid who doesn't really know his way around the game.
He's trying this feature and sends whatever he has, like you would have sent at that age.
Then he gets it. Some rare dragon. A starter. A cool new gen Pokemon, or some high leveled one.
He's super stoked about it. He treasures it, he shows it off to his friends at school.
Your mon has just become his bro, he can't stop smiling all day because of it.
Just like you would have, 10-15 years ago.

And you know what? Odds are, in the 100 or so Wondertrades you'll do, you'll fall on at least a few of these kids.
And THAT is why I don't get mad why I get the hundreth Japanese Bunnelby.