At this point most of us has agreed "using 2 Blissey/Zamazenta plus an attacker" is the default plays in Max Battle. So beyond here, we have started to explore the boundary regimes, the area where this default strategy does not always hold true.
Sobble or low level Pokemon stunlocking Dynamax Legends is one, this is the another one.
Ho-Oh is only double weak to Rock-type, but there is no 0.5s Rock-type fast move. So we ended up using either Omastar or Inteleon with Water Gun. Even when Omastar learns Rock Slide, it didn't really utilize the full potential of Rock-type double weakness here.
This allows an alternative, where we simply give up on 0.5s move and use Rock-type moves to charge the max meter. It is slower, but the extra damage from Smack Down and Meteor Beam had compensate Max Moves damage we have missed due to not focusing on charging the meter.
This setup is exactly the same as the Solo we did with Inteleon, Omastar and Lugia, where there is 2 gloves helper in spot, no weather boost damage bonus and no adventure effect used. Unfortunately, Scopely has nerfed Dynamax Ho-Oh's HP by 2000, so it is impossible for us to replicate the boss itself. However, as shown in the video, there are 2 extra Max Rockfall left when Dynamax Ho-Oh is defeated, so that 2000 HP wouldn't have affected the result.
by Nikaidou_Shinku