95/80/105/40/70/105
Name: Support Wall/Hax Wall
Moves: Seismic Toss/Milk Drink/Thunder Wave/Heal Bell or Attract
Ability: Scrappy
Nature: Impish
Item: Leftovers
EVs: 252 Defense/252 HP/4 Speed
http://www.smogon.com/dp/pokemon/miltank
[SET COMMENTS]
Miltank is the only wall with acces to a "Perfect" Seismic Toss, as it can hit even Ghosts thanks to her Scrappy ability.
That, with high defenses and a 100 base Speed make her a really interesting Pokémon.
To give you an idea, with the EV spread showed above, Miltank can survive a Choice Band Adamant Scizor's SuperPower, then Thunder Wave and Milk Drink.
The choice between Heal Bell/Attract is up to you, Heal Bell is great for supporting partners, while Attract in conjunction with Thunder Wave makes Miltank a beast of the hax.
[TEAMMATES AND COUNTERS]
The only Pokémon who can effectively counter Miltank are strong Special Attackers, which is why she enjoys the company of Blissey or Milotic depending on the tier.