Hah! Eelektross has an amazing defensive typing combined with Levitate, allowing it to check threats such as MAlt, Clefable, Azumarill, Sand Rush Excadrill (thanks to Flamethrower), Keldeo, Talonflame, etc. Mega Gardevoir does pose as a challenge due to its massive SpA + SE STAB, but that cant be avoided. Choice Specs Sylveon barely 2HKO's with Psyshock, while Gunk Shot is a CLEAN OHKO. I added Gunk so it could threaten the fairies it walls, since they are specially bulky, but then I remembered it had access to Coil, and its immunity to Toxic damage + a powerful STAB option to run can make it a gimicky but effective bulky sweeper, but I agree that its AV set is its best set.
Its basically a great sponge-er of non supereffective attacks, and tanks hits its not supposed to. Its a great tank.
252 SpA Choice Specs Keldeo Hydro Pump vs. 252 HP / 0 SpD Assault Vest Eelektross: 216-255 (57.7 - 68.1%) -- guaranteed 2HKO
252+ Atk Choice Band Talonflame Brave Bird vs. 252 HP / 252+ Def Eelektross: 97-115 (25.9 - 30.7%) -- guaranteed 4HKO
252+ Atk Choice Band Talonflame Flare Blitz vs. 252 HP / 252+ Def Eelektross: 195-231 (52.1 - 61.7%) -- guaranteed 2HKO
252 SpA Life Orb Latios Psyshock vs. 252 HP / 252+ Def Eelektross: 283-335 (75.6 - 89.5%) -- guaranteed 2HKO
252 SpA Mega Charizard Y Fire Blast vs. 252 HP / 0 SpD Assault Vest Eelektross in Sun: 253-298 (67.6 - 79.6%) -- guaranteed 2HKO
232 SpA Mega Gardevoir Psyshock vs. 252 HP / 252+ Def Eelektross: 258-306 (68.9 - 81.8%) -- guaranteed 2HKO
252+ SpA Life Orb Clefable Moonblast vs. 252 HP / 0 SpD Assault Vest Eelektross: 71-86 (18.9 - 22.9%) -- possible 5HKO
252+ SpA Choice Specs Adaptability Porygon-Z Tri Attack vs. 252 HP / 0 SpD Assault Vest Eelektross: 238-280 (63.6 - 74.8%) -- guaranteed 2HKO
180 SpA Life Orb Tornadus-T Hurricane vs. 252 HP / 0 SpD Assault Vest Eelektross: 78-94 (20.8 - 25.1%) -- 0% chance to 4HKO
252+ Atk Life Orb Excadrill Rock Slide vs. 252 HP / 252+ Def Eelektross: 100-118 (26.7 - 31.5%) -- guaranteed 4HKO
+1 252+ Atk Pixilate Mega Altaria Return vs. 252 HP / 252+ Def Eelektross: 132-156 (35.2 - 41.7%) -- guaranteed 3HKO
252 SpA Mega Alakazam Psyshock vs. 252 HP / 252+ Def Eelektross: 272-324 (72.7 - 86.6%) -- guaranteed 2HKO
252 SpA Life Orb Thundurus Hidden Power Ice vs. 252 HP / 0 SpD Assault Vest Eelektross: 66-79 (17.6 - 21.1%) -- possible 5HKO
+3 252 SpA Manaphy Scald vs. 252 HP / 0 SpD Assault Vest Eelektross: 219-258 (58.5 - 68.9%) -- guaranteed 2HKO
-/-/-/-/-/-/-/
4 SpA Eelektross Thunderbolt vs. 0 HP / 0 SpD Manaphy: 204-242 (59.8 - 70.9%) -- guaranteed 2HKO after Leftovers recovery
4 SpA Eelektross Thunderbolt vs. 0 HP / 0 SpD Keldeo: 222-264 (68.7 - 81.7%) -- guaranteed 2HKO
4 SpA Eelektross Thunderbolt vs. 0 HP / 0 SpD Talonflame: 276-326 (92.9 - 109.7%) -- 56.3% chance to OHKO
0 Atk Eelektross Knock Off (97.5 BP) vs. 0 HP / 0 Def Latios: 190-224 (63.5 - 74.9%) -- guaranteed 2HKO after Stealth Rock
0 Atk Eelektross Gunk Shot vs. 0 HP / 24 Def Gardevoir: 398-470 (143.6 - 169.6%) -- guaranteed OHKO
4 SpA Eelektross Flamethrower vs. 0 HP / 0 SpD Excadrill: 192-228 (53.1 - 63.1%) -- guaranteed 2HKO after Stealth Rock
252+ Atk Choice Band Talonflame Brave Bird vs. 252 HP / 252+ Def Eelektross: 97-115 (25.9 - 30.7%) -- guaranteed 4HKO
252+ Atk Choice Band Talonflame Flare Blitz vs. 252 HP / 252+ Def Eelektross: 195-231 (52.1 - 61.7%) -- guaranteed 2HKO
252 SpA Life Orb Latios Psyshock vs. 252 HP / 252+ Def Eelektross: 283-335 (75.6 - 89.5%) -- guaranteed 2HKO
252 SpA Mega Charizard Y Fire Blast vs. 252 HP / 0 SpD Assault Vest Eelektross in Sun: 253-298 (67.6 - 79.6%) -- guaranteed 2HKO
232 SpA Mega Gardevoir Psyshock vs. 252 HP / 252+ Def Eelektross: 258-306 (68.9 - 81.8%) -- guaranteed 2HKO
252+ SpA Life Orb Clefable Moonblast vs. 252 HP / 0 SpD Assault Vest Eelektross: 71-86 (18.9 - 22.9%) -- possible 5HKO
252+ SpA Choice Specs Adaptability Porygon-Z Tri Attack vs. 252 HP / 0 SpD Assault Vest Eelektross: 238-280 (63.6 - 74.8%) -- guaranteed 2HKO
180 SpA Life Orb Tornadus-T Hurricane vs. 252 HP / 0 SpD Assault Vest Eelektross: 78-94 (20.8 - 25.1%) -- 0% chance to 4HKO
252+ Atk Life Orb Excadrill Rock Slide vs. 252 HP / 252+ Def Eelektross: 100-118 (26.7 - 31.5%) -- guaranteed 4HKO
+1 252+ Atk Pixilate Mega Altaria Return vs. 252 HP / 252+ Def Eelektross: 132-156 (35.2 - 41.7%) -- guaranteed 3HKO
252 SpA Mega Alakazam Psyshock vs. 252 HP / 252+ Def Eelektross: 272-324 (72.7 - 86.6%) -- guaranteed 2HKO
252 SpA Life Orb Thundurus Hidden Power Ice vs. 252 HP / 0 SpD Assault Vest Eelektross: 66-79 (17.6 - 21.1%) -- possible 5HKO
+3 252 SpA Manaphy Scald vs. 252 HP / 0 SpD Assault Vest Eelektross: 219-258 (58.5 - 68.9%) -- guaranteed 2HKO
-/-/-/-/-/-/-/
4 SpA Eelektross Thunderbolt vs. 0 HP / 0 SpD Manaphy: 204-242 (59.8 - 70.9%) -- guaranteed 2HKO after Leftovers recovery
4 SpA Eelektross Thunderbolt vs. 0 HP / 0 SpD Keldeo: 222-264 (68.7 - 81.7%) -- guaranteed 2HKO
4 SpA Eelektross Thunderbolt vs. 0 HP / 0 SpD Talonflame: 276-326 (92.9 - 109.7%) -- 56.3% chance to OHKO
0 Atk Eelektross Knock Off (97.5 BP) vs. 0 HP / 0 Def Latios: 190-224 (63.5 - 74.9%) -- guaranteed 2HKO after Stealth Rock
0 Atk Eelektross Gunk Shot vs. 0 HP / 24 Def Gardevoir: 398-470 (143.6 - 169.6%) -- guaranteed OHKO
4 SpA Eelektross Flamethrower vs. 0 HP / 0 SpD Excadrill: 192-228 (53.1 - 63.1%) -- guaranteed 2HKO after Stealth Rock
Its basically a great sponge-er of non supereffective attacks, and tanks hits its not supposed to. Its a great tank.