>>43128875Yveltal is probably the most lethal attacker if you go by lore. If you're going by game mechanics, Kyogre hits stupidly hard and can learn Sheer Cold. Most things with Sturdy are either weak agiasnt it, have shit special defense, or both. Out of those, the only ones Kyogre won't hit for ridiculously high amounts of damage are Magnezone, Togedamaru, and Cosmoem. Cosmoes doesn't matter s it's a non-issue, and Kyogre can learn Earthquake to fuck up Magnezone and Togedemaru.
I think the most generally dangerous pokemon would be Primal Kyogre with Origin Pulse, Sheer Cold, Earthquake, and either Ice Beam or Thunder.