With that decided, Xia You simply stopped having them hold it back.
After all, they had been blocking it for so long that they had already stopped most of the strongest impact. Even if the remaining energy surged outward, after sweeping across the vast sea, it would no longer be able to cause too much destruction to the Hoenn Region.
At most, it would be on the level of a severe storm. Although it would still cause some damage to cities and villages, at least for human society as a whole, it was well within tolerable limits.
He had already done enough. Now it was time to focus all his attention on Primal Groudon and Primal Kyogre.
It was also time to let those two get a taste of Three-Bird Fusion!
When he had last caught Deoxys, the Legendary Birds had also used Three-Bird Fusion, but Deoxys had blocked it with the double defense of its Barrier and Defense Forme. Even so, the damage from the Three-Bird Combo had destroyed half of Deoxys's body at the time. Only its ultrafast regeneration had made it look unharmed in the end.
But now...
Xia You wanted to see just how Primal Groudon and Primal Kyogre would take this move!
They were too far away for Gardevoir's Telepathy to transmit his commands into the Legendary Birds' minds, but Xia You came up with a clever solution: first transmit the instructions into Deoxys's mind through Telepathy, then have Deoxys act as a relay station to pass the commands along.
He had to admit that it worked very well indeed. Sure enough, before long, Xia You reestablished contact with the Legendary Birds.
Once the command reached them, the Legendary Birds beat their wings and soared above the clouds, gathering together and beginning to accumulate energy.