So Axelsior does get the KO on Swampert but that opens him up to Hydreigon again - however, Axelsior rightly notices that whenever Hydreigon KOs something (like the weak Skarmory) on turn 27, the next turn, Axelsior's own Conkeldurr gets an opening to basically get a free KO because Togekiss is too low to switch in (actually, it could have switched in on turn 28 as it took a no Guts Knock Off + Guts Mach Punch so maybe this was an option for Liam - it was very unlikely Conkeldurr would click Facade before Flame Orb Activated).
Axelsior smartly remembers the pattern of Conkeldurr getting KOs when it comes in for free when doing the Krookodile vs Amoonguss sequence and decides to let Krookodile die so Conkeldurr gets another free KO. Perhaps he should have set up Rocks if he had them to help get Hydreigon in Mach Punch range though, as Mach Punch only does 84% max to Hydreigon. Nevertheless, Conkeldurr claims another KO on turn 34 (these type of games make me think Conkeldurr is broken, but I digress, that's for another thread: post opinions on tiering action here:
https://www.smogon.com/forums/threads/np-ss-uu-stage-10-airplanes-latias-retest.3691692/)
Despite Conkeldurr doing great work - Liam still has a clear win path - sweep with Thundurus and use his own Hydreigon to beat opposing Thundurus.