Jacob Polakoff 

Many people look over the power of Onix. They think he is weak because his 
attacks aren't that great, but they can stall the opponent, espically in the 
early turns.It can save you up to 3 or 4 turns with it's 90 HP. I have a 
Lightning deck and I put 1 or 2 Onix in it so I have time to build up my 
Zapdos or Rachiu.That is why Onix is so good.