[quote=@Kho]
<Snipped quote by Hael>

Plot line/Player agreement - If the players have agreed what the result will be, then that is that (unless the result is really weird. Like a frail old mortal lizard which can't think and has no magical powers going up against a hero and winning.)
[/quote]

But what if it was given the blessing of perfect good luck? Or is the personal pet of a demigod that would appear if it got attacked?

Edit: Sorry about nitpicking but you saying that made me think about a situation where the lizard would win.