What are the best natures for the legendaries and UBs? I need

>>30095396
First of all it's better to breed a male and female Abra both from Route 2 so you get your synchronize fodder immediately as opposed to needing to evolve Eevee painfully

Second:

Koko: Timid or Naive
Lele: Modest or Timid
Fini: Timid, Modest, Bold
Bulu: Adamant

Pheromosa: Jolly, Adamant, Naive, Naughty
Nihilego: Timid, Modest
Buzzwole: Adamant, Impish, Careful
Xurkitree: Modest, Timid
Kartana: Jolly, Adamant
Celesteela: Sassy, Brave, Adamant
Guzzlord: Who cares

>>30095396
I think Abra hatches faster and you don't need to do Happiness bullshit.

>>30096547
Indeed.

If you get Fletchinder and do the Taurus exploit near the Nursery, you can hatch a batch Abras in just two minutes

>>30096644
Tauros Exploit?

>>30097006
https://youtu.be/Ib0i_1Nv71Q?t=43

move your circle pad round and round in a certain area. It's faster than it was than the Lumiose City circle iirc, but no coin tricks as a trade.