Mega Latios as a Hard Check (maybe Counter)
Latios-mega @ Latiosite
Ability: Levitate
EVs: 4 Atk / 252 SpA / 252 Spe
Naive Nature
- Draco Meteor
- Psychic
- Earthquake
- Roost
Mega Latios takes little damage from anything Gliscor or Toxapex can do. Scald from Toxapex does minimal damage to Latios due to its good special bulk and how weak Toxapex is. A burn annoys Mega Latios slightly due to the residual damage and the reduction in EQ's power which makes the move less effective against its usual targets (Heatran, Magearna, Tyranitar, Magnezone). Due to its Levitate ability Mega Latios does not care about Toxic Spikes but hates taking a Toxic as it cuts into its longevity and can be very annoying over time.
Meanwhile Psychic is an easy 2hko on Toxapex:
252 SpA Latios-Mega Psychic vs. 248 HP / 252+ SpD Toxapex: 194-230 (64 - 75.9%) -- guaranteed 2HKO
Mega Latios is immune to Gliscor's EQ due to Levitate and takes only a bit of damage from Knock Off, despite being weak to it, due to Mega Latios's decent physical bulk, Gliscor's low attack stat and Knock Off not receiving the boost as it cannot remove the Latiosite:
0 Atk Gliscor Knock Off vs. 0 HP / 0 Def Latios-Mega: 90-108 (29.9 - 35.8%) -- 31.9% chance to 3HKO
In Return, Mega Latios gets a guaranteed 2hko with Psychic and has a small chance to OHKO with Draco Meteor if rocks are up:
252 SpA Latios-Mega Psychic vs. 244 HP / 152 SpD Gliscor: 181-214 (51.4 - 60.7%) -- guaranteed 2HKO after Stealth Rock and Poison Heal
252 SpA Latios-Mega Draco Meteor vs. 244 HP / 152 SpD Gliscor: 262-309 (74.4 - 87.7%) -- 6.3% chance to OHKO after Stealth Rock and Poison Heal