Albacore
sludge bomb is better than sludge wave
Why would you use Water Pulse on Mega Blastoise? Use Surf or Hydro Pump!252+ SpA Mega Blastoise Water Pulse vs. 0 HP / 4 SpD Archeops: 314-372 (107.9 - 127.8%) -- guaranteed OHKO (so it still is a check)
252 Atk Life Orb Lucario Bullet Punch vs. 0 HP / 0 Def Archeops: 218-257 (74.9 - 88.3%) -- 87.5% chance to OHKO after Stealth RockAnd on a side note, LO regular Luke is probably a check to Archeops since it's Bullet Punch is stronger. Really, with Adaptability gone, all Mega Luke has got going for it is its speed.
So, Life Orb Lucario is only a check Archeops if SR is up.
It's suprisingly easy to forget that abilities do not exist in the no-ability metagame.