Drapion as a
counter or
check (depending on the set)
Drapion @ Black Sludge
Ability: Battle Armor
EVs: 248 HP / 8 Atk / 252 SpD
Careful Nature
- Knock Off
- Taunt
- Toxic Spikes
- Poison Jab/Whirlwind/Pursuit
+1 252+ SpA Mega Alakazam Focus Blast vs. 248 HP / 252+ SpD Drapion: 232-274 (67.6 - 79.8%) -- guaranteed 2HKO after Black Sludge recovery
+1 252+ SpA Mega Alakazam Dazzling Gleam vs. 248 HP / 252+ SpD Drapion: 155-183 (45.1 - 53.3%) -- 1.2% chance to 2HKO after Black Sludge recovery
+1 252+ SpA Mega Alakazam Dazzling Gleam vs. 248 HP / 252+ SpD Drapion: 155-183 (45.1 - 53.3%) -- 89.5% chance to 2HKO after Stealth Rock and Black Sludge recovery
+1 252+ SpA Mega Alakazam Shadow Ball vs. 248 HP / 252+ SpD Drapion: 77-91 (22.4 - 26.5%) -- possible 5HKO after Black Sludge recovery
This is if it CM on the switch with Modest nature. Focus Miss is the only thing guaranteed to 2HKO (assuming he hits both), and iirc is the least used of the 4 attacks (could be wrong). Dazzling Gleam has a good chance to 2HKO if SR are up on your side. If the M-Zam is going Protect instead...
252+ SpA Mega Alakazam Focus Blast vs. 248 HP / 252+ SpD Drapion: 156-184 (45.4 - 53.6%) -- 91.8% chance to 2HKO after Stealth Rock and Black Sludge recovery
252+ SpA Mega Alakazam Dazzling Gleam vs. 248 HP / 252+ SpD Drapion: 104-123 (30.3 - 35.8%) -- 40.3% chance to 3HKO after Stealth Rock and Black Sludge recovery
252+ SpA Mega Alakazam Shadow Ball vs. 248 HP / 252+ SpD Drapion: 52-61 (15.1 - 17.7%) -- possible 7HKO after Stealth Rock and Black Sludge recovery
Yeah, Focus Blast twice is the only way you'll get 2HKOed. Meanwhile...
8 Atk Drapion Knock Off vs. 0 HP / 4 Def Mega Alakazam: 186-218 (74.1 - 86.8%) -- guaranteed 2HKO after Stealth Rock
8 Atk Drapion Pursuit vs. 0 HP / 4 Def Mega Alakazam: 224-266 (89.2 - 105.9%) -- guaranteed OHKO after Stealth Rock
With any prior damage, you'll win. If you are running Pursuit and get the switch, say good bye to M-Zam. This is a pretty standard Drapion set that is viable (would thrive if not for Diggersby/Zygarde, though Zygarde loves Drapion support). However, one could argue that it is merely a check, since M-Zam still has a chance to come out on top (if running FB). The following set is, however, a counter, although perhaps less viable.
Drapion @ Assault Vest
Ability: Battle Armor
EVs: 248 HP / 96 Atk / 164 SpD
Adamant Nature
- Knock Off
- Poison Jab
- Aqua Tail/Ice Fang/Earthquake
- Pursuit
252+ SpA Mega Alakazam Focus Blast vs. 248 HP / 164 SpD Assault Vest Drapion: 125-148 (36.4 - 43.1%) -- guaranteed 3HKO after Stealth Rock
Focus Blast no longer 2HKOs, and if it chooses to CM on the switch...
+1 252+ SpA Mega Alakazam Focus Blast vs. 248 HP / 164 SpD Assault Vest Drapion: 187-221 (54.5 - 64.4%) -- guaranteed 2HKO after Stealth Rock
Guaranteed 2HKO (remember no crit hax because of Battle Armor). Drapion can then get a guaranteed OHKO with Knock Off with SR (if you want to get the OHKO without rocks, run 212 Atk / 48 SpD, but you have a high chance of getting 2HKOed by FB after SR damage if you do).
96+ Atk Drapion Knock Off vs. 0 HP / 4 Def Mega Alakazam: 222-264 (88.4 - 105.1%) -- guaranteed OHKO after Stealth Rock
Again, Pursuit will OHKO if they choose to switch. Coverage move depends on what you need covered, although Poison/Dark coverage is pretty decent by itself. AV Drapion will deal with M-Zam better, but perhaps isn't as viable as Specially Defensive Drapion. Either set is a great answer to M-Zam though.
PS. No Psyshock calculations because... yeah, no. Timid nature would just make you win the match up harder than you already do.
EDIT: Those of you doing fine-tuned calcs, it probably won't make a difference, but remember its 4 Def EVs, not 4 HP EVs. It mattered for my AV Drapion set, since 4 Def made me have to invest 4 more in Atk.