First of all your sig is too big. You have to shrink your pictures (please read the rulebook again before the "higher mods" start picking on you).
Secondly, you said "What do you think is the strongest common wild pokemon?" not the strongest Pokemon I have. We all know that there's no such thing as a strong wild Pokemon, as even they use explosion and it cannot even knock my Sceptile to yellow. So the closest you get is one with whirlwind or roar as they'll end the battle as a stalemate.