I was trying to find out exactly what the absolute max damage could be dealt in the game and I realized it would probably be a +nature Defence IV&EV shuckle using a defense curled 5th rollout hit after 6 defense buffs and a power swap (for an attack stat of 2456!) with helping hand as a critical hit against a 1 defense (with modifiers it's possible) bug flying type (I used ledyba). So I went to the calculator to figure out the actual number and i kept getting this error:

[phpBB Debug] PHP Notice: in file /z/www/www.psypokes.com/psypokes.com/dex/psydex/mfmnddamage.php on line 111: Invalid argument supplied for foreach()

So with a little fidgeting I found that it worked fine if I didn't have any held item or any of the extra effects clicked such as critical hit and helping hand but as soon as I put just one of those on, it malfunctions.

And if anyone was wondering what the actual damage on that would be it's 53474049! O_o