>>55184527Because despite their high special attack you don't add thundurus/tornadus to your team on offensive pressure. It does make them better but their main purpose is prankster support. And Tornadus' toolset is now better than Thundurus mainly because of tailwind vs twave which was nerfed to death.
Actually in gen 6 Thundurus was a lot more popular but prankster twave is now blocked by dark types, psychic terrain, queenly majesty and its clones. While tailwind is not because it affects the field and not a target. On top of that paralysis itself was nerfed - until gen 6 it cut speed by 75%, since the it just halves it which makes it literally worse than tailwind, at least in fast paced formats like VGC
On top of that now Tornadus was given a proper stab which makes it even better compared to thundurus
