Answer 1

Oooooooh!
You Know, Just Your Luck too! I Just Started Raising A Special Cradily With A Planned Moveset for it!

EVs In Sp. Attack, Defense, and Special Defense

Moves:

Energy Ball/Giga Drain: In Black and white, Giga Drains got a Base 75 Power, plus healing. However, if this isnt Black or White, Use Energy Ball.

Toxic: Good Defenses on Cradily. It Had To Be Here.

Swagger/Confuse Ray: To Confuse.

Ancientpower/Sludge Bomb/Synthesis/Earth Power: Ancientpower for STAB, Sludge Bomb to get rid of those other grass Types, or Synthesis to stall or Earth Power For Coverage.

Comments

A good cradily set is not something I thought I would ever see

Answer 2

This is based off of my Stall Cradily that has won me tonnes of competitive battles, Lileep + Eviolite actually has better defenses, so it should work out fairly well:

Lileep (F) @ Eviolite
Trait: Suction Cups / Storm Drain
EVs: 112 HP / 240 Def / 84 SAtk / 72 SDef
Calm Nature (+SDef, -Atk) / Sassy Nature (+SDef, -Spd)
- Earth Power / Hidden Power [Ground]
- Toxic
- Stockpile
- Recover
Earth Power or Hidden Power hits Steel types, namely Heatran, and Poison types. Toxic kills everything else, while you build defenses with Stockpile, and Recover off damage. Eviolite gives it some bloated defenses before Stockpile even starts.
EVs give it 301 HP, and 375 in each defense (after Eviolite boost), with the rest going into SAtk so EP will do some damage. a Nature that boosts Spec defense without lowering SpAtk or Def is the best way to go.
Recover + Storm Drain would be difficult to get on a single set, nigh impossible with HP Ground, but if you're on PO, this is the preferred set. To get Earth Power, it would have to be a Gen IV import, not usually that big a deal.