For the record, the bat does NOT need to be 282 or higher speed, just the first pet. The bat needs to be a breed that is ~273 speed. I had no bats that were S/S or higher than 273 so I attempted it and there was no issue.
Likewise, Teroclaw should be (2, 1, 2) And I'm not sure what "elemental ward" could be? Since you use dodge in the first round, it can't be "nature's ward." Hmm... Apart from that, this strat works well!
My Shrine Fly and Bat weren't fast enough, so I used:
Violet Firefly (H/S) 1-1-1
Bat (H/P) 1-1-1'
I opened with Dazzling Dance , then followed the strat as mentioned. When finally my Violet Firefly was swapped in again, I did Scratch - Dazzling Dance (during Shadeflicker's Dodge turn) and finished him off with another Scratch. Bat was still alive after the fight, so with that extra Dazzling Dance I guess it could've won the fight had the fly died.
Couldn't figure out why my S/S Bat didn't meet the requirements. Speed was good, but HP were low. Head scratched for a while then realized that he was Uncommon. Stoned him up to Rare and he was a perfect fit! :) Thanks, Lazey & XuFu.