Personally, for the Autumn Regionals I'm going to be running M Rayquaza. I'm testing it with Manaphy, Glaceon, Octillery, and of course Hoopa and Shaymin. However I'm debating between running a 1-1 Zebstrika or 1-1 Altaria line. I feel Zebstrika is a fine enough attacker, however I often find myself Compressing it away because it's not that useful in most situations, and would rather just thin out the deck, or save my bench space for another Pokemon. Altaria could be more useful, as I feel like it's unnecessary to have a secondary attacker, when you could just attack with M Rayquaza while removing the Lightning weakness off your back. Plus it has the Delta Plus, so you can get it into play when you first play Swablu:
Here's my Pokemon list by the way:
3x M Rayquaza-EX (Colorless)
2x Rayquaza-EX (Colorless)
2x Rayquaza-EX (Dragon)
2x Shaymin-EX
1x Glaceon-EX
1x Manaphy-EX
1x Hoopa-EX
2x Octillery
2x Remoraid
1x Zebstrika/Altaria
1x Blitzle/Swablu
*I wish I could add 2 more Shaymin-EX, but there to expensive, so I find Octillery the best option to keep this deck running smoothly without having to spend $200 on Shaymins.*
Here's my Pokemon list by the way:
3x M Rayquaza-EX (Colorless)
2x Rayquaza-EX (Colorless)
2x Rayquaza-EX (Dragon)
2x Shaymin-EX
1x Glaceon-EX
1x Manaphy-EX
1x Hoopa-EX
2x Octillery
2x Remoraid
1x Zebstrika/Altaria
1x Blitzle/Swablu
*I wish I could add 2 more Shaymin-EX, but there to expensive, so I find Octillery the best option to keep this deck running smoothly without having to spend $200 on Shaymins.*