Reserving Stunfisk as a check!
HARD CHECK!!!!
Stunfisk @ Leftovers
Ability: Static
EVs: 252 HP / 252 SpD / 4 SpA
Calm Nature
- Stealth Rock
- Earth Power
- Discharge
- Toxic
Kinda standard Stunfisk that doesn't even need investing on Defense to get easily onto Klang and beat it... (Physically Defensive Stunfisk can even be considered a Counter, since +6 0 Atk Klang Gear Grind (2 hits) vs. 248 HP / 252+ Def Stunfisk: 144-170 (34.2 - 40.3%) -- approx. 42.9% chance to 3HKO after Leftovers recovery which is basically hideous)
Defensive Calcs
0 Atk Klang Gear Grind (2 hits) vs. 248 HP / 8 Def Stunfisk: 50-60 (11.8 - 14.2%) -- possibly the worst move ever
+1 0 Atk Klang Gear Grind (2 hits) vs. 248 HP / 8 Def Stunfisk: 76-90 (18 - 21.3%) -- possible 6HKO after Stealth Rock and Leftovers recovery
+2 0 Atk Klang Gear Grind (2 hits) vs. 248 HP / 8 Def Stunfisk: 102-120 (24.2 - 28.5%) -- approx. 0% chance to 4HKO after Stealth Rock and Leftovers recovery
+3 0 Atk Klang Gear Grind (2 hits) vs. 248 HP / 8 Def Stunfisk: 126-150 (29.9 - 35.6%) -- approx. 0% chance to 3HKO after Stealth Rock and Leftovers recovery
+4 0 Atk Klang Gear Grind (2 hits) vs. 248 HP / 8 Def Stunfisk: 152-180 (36.1 - 42.7%) -- guaranteed 3HKO after Stealth Rock and Leftovers recovery
+5 0 Atk Klang Gear Grind (2 hits) vs. 248 HP / 8 Def Stunfisk: 178-210 (42.2 - 49.8%) -- guaranteed 3HKO after Stealth Rock and Leftovers recovery
+6 0 Atk Klang Gear Grind (2 hits) vs. 248 HP / 8 Def Stunfisk: 204-240 (48.4 - 57%) -- approx. 96.9% chance to 2HKO after Stealth Rock and Leftovers recovery
Offensive Calcs
0 SpA Stunfisk Earth Power vs. 252 HP / 100 SpD Eviolite Klang: 114-134 (35.1 - 41.3%) -- guaranteed 3HKO
0 SpA Stunfisk Earth Power vs. -1 252 HP / 100 SpD Eviolite Klang: 168-198 (51.8 - 61.1%) -- guaranteed 2HKO
Heck... Klang needs to be REALLY lucky to set up onto +6 without getting a Special Defense drop, getting some Para turns thanks to Static if it decides to attack and with Sleep Talk getting the right moves on the right time (that even discounting Gear Grind imperfect accuracy)...
However if Stunfisk doesn't get the Special Defense Drop in a few turns, it is probable that Klang can still setup onto +6 and eventually 2HKO Stunfisk (While OHKO everything else of course xD) and that's why it's just a check...
See ya guys!