How do you know that it wasn't fully invested in Defence and HP? - [252 Atk Technician Scizor Bullet Punch vs. 252 HP / 252 Def Greninja: 200-236 (57.4 - 67.8%) -- guaranteed 2HKO]http://replay.pokemonshowdown.com/frost-ou-334474
fully invested scizor uses Bullet Punch on Protean Greninja which has turned to Ice Type. It does only 59%
252+ Atk Technician Scizor Bullet Punch vs. 4 HP / 0 Def Greninja: 75-88 (26.2 - 30.7%) -- guaranteed 4HKO
it should do 4 times the above calc, leading to a OHKO