>>18887859ok first of all
talonflame outspeeds whimsicot 386 to 364
but just for fun lets assume talonflame is adament and invested hp instead of speed so its not a OHKO
after one cotton guard
252+ Atk Choice Band Talonflame Brave Bird vs. +3 252 HP / 0 Def Whimsicott: 218-258 (67.2 - 79.6%) -- guaranteed 2HKO after Leftovers recovery
after a 2nd cotton guard
252+ Atk Choice Band Talonflame Brave Bird vs. +6 252 HP / 0 Def Whimsicott: 134-162 (41.3 - 50%) -- guaranteed 3HKO after Leftovers recovery
its still a 2HKO
also
>hidden power rock0 SpA Whimsicott Hidden Power Rock vs. 252 HP / 0 SpD Talonflame: 192-228 (53.3 - 63.3%) -- guaranteed 2HKO
still a 2HKo with full special investment too
252+ SpA Whimsicott Hidden Power Rock vs. 252 HP / 0 SpD Talonflame: 276-328 (76.6 - 91.1%) -- guaranteed 2HKO
not to mention even it outspeeds talonflame brave bird will get priority over hp rock