>>16813230You're using a level 5 Charmander for your calculations, of course it's going to get OHKOed. If you use level 100...
>252 SpA Genesect Thunderbolt vs. 6 HP / 252 SpD Charmander: 110-130 (50 - 59%) -- guaranteed 2HKOIt needs to be modest with specs and 252 SpA to do it, but it CAN survive a hit, and OHKO back with Ember.
...81.3% of the time, anyway.