I still can not select a weapon, I went back in and tried. Here's the battle info as listed:

Mephysto's Trapper Zapper surrounds you with an array of colors! Mephysto attempts to thwart your attack by placing you under a dance of doom!

Your Awesomely Totally Bent Pokey Stick generates a celestial beam that recklessly prods the opponent! You twirl your Dual Flintlock Pistols around your fingers before expertly firing at your opponent!

, evidently I must have been frozen. Once I clicked through I was able to make a selection. Thank you, sorry I am just learning all of the ins and outs of battling.

You're welcome! :)