>>34142320Well, let's sit down over this.
I'm running some calcs for giggles. I'm using Latias for Necrosma, Psychic for Photon Geyser, Shattered Psyche for Light that Burns the Sky, and giving it an Expert belt for its item. I'm also unsure of, but am assuming it gets Dragon Pulse. I've tweaked the details where they matter.
252+ Atk Rayquaza-Mega Dragon Claw vs. 0 HP / 0 Def Latias: 378-446 (112.8 - 133.1%) -- guaranteed OHKO
So, if Mega Fug goes first (Scarf, Predicted Switch, ect), it gets an easy OHKO.
252+ Atk Rayquaza-Mega Dragon Ascent vs. 0 HP / 0 Def Latias: 282-333 (84.1 - 99.4%) -- guaranteed 2HKO
Even if it only lands a DA, that puts Necrozma within KO range if rocks are in play, and renders it vulnerable to priority.
However, Fug needs prediction or a scarf to do this. On the other hand.
2252 SpA Expert Belt Latias Dragon Pulse vs. 0 HP / 0 SpD Rayquaza-Mega: 406-478 (115.6 - 136.1%) -- guaranteed OHKO
252 SpA Latias Psychic vs. 0 HP / 0 SpD Rayquaza-Mega: 198-234 (56.4 - 66.6%) -- guaranteed 2HKO
252 SpA Latias Shattered Psyche (200 BP) vs. 0 HP / 0 SpD Rayquaza-Mega: 394-465 (112.2 - 132.4%) -- guaranteed OHKO
Necrozma does not fuck around either, and IS landing these hits. Fug does force Necrozma to run a speed boosting nature and at least 144 speed EVs to guarantee outspeeding the fastest, non-scarfed fug. However, the fact that it can't OHKO with Photon Geyser means Fug CAN play prediction to get a switch in. However, this is risky, and can only be done once.
252 Atk Life Orb Technician Marshadow Shadow Sneak vs. 0 HP / 0 Def Latios: 257-304 (76.7 - 90.7%) -- guaranteed 2HKO
252+ Atk Life Orb Technician Marshadow Shadow Sneak vs. 0 HP / 0 Def Latias: 281-330 (83.8 - 98.5%) -- guaranteed 2HKO
Also good figures for Necrozma. Marshadow cannot be a pocket check to Necrozma, though it can threaten it if it is injured, or rocks are in play.
More calcs and thinking points in a moment