Hey, guess what... I got the Denjuu encounter data figured out for every map in the game. Take a look at the topic about it in Tulunk Village or what I posted in Data Crystal (notice there are two sub sections, the acre map data and the Denjuu and level data, I don't want you to miss the bottom one because it's easy to miss!). I know you wanted to make a tool for it, and this should be enough to make one. I just hope I explained all the information well...
Just one thing, though... in some acres, you can only find wild Denjuu in grass/water, and in other acres, you can find Denjuu ANYWHERE... and I haven't figured out where that data is, unfortunately. But it should be enough for now.
And I feel really stupid posting Telefang stuff on a Pokémon message board... but I've gotten myself into Pokémon again recently with Pokémon Platinum, so I'll post Pokémon related stuff here soon enough...