Zekromaster826
Casual Shiny Hunter
I used it on Zekrom in the first playthrough, Thundrus in Second
Thundurus.
The Roamers are getting harder to catch every generation, now that Trap passing no longer works and they can run away WHILE ASLEEP.
On the other hand, Resh and Zek are easier to catch then chatot. Seriously, look it up.
Thunderous was easy because I got a Wynautt with Shadow Tag (Got it as a swarm).