They're hard to find because they only spawn during foggy weather. :/ There is no symbol for foggy weather but it's easy enough to tell weather or not it's foggy (just look at the pic and you'll see what foggy weather looks like), basically when stuff is far away from you it looks gray. I thought there was something wrong with the graphics the first time I saw foggy weather. ^^;;
note: All bomb-type monsters that spawn in outdoor areas only spawn during foggy weather, but bomb-type monsters that spawn in dungeons will spawn during any weather.
Edit: Lol, if you look at the top of the page it says "Appears during Clouds/Fog", so I guess it spawns during cloudy weather, too. Again, there is no symbol for cloudy weather, so you just have to be vigilant.
I'm think it's a random spawn. I've seen them around Sandoria a couple of times in the Ronfaure areas, carefull though they pack a punch when they're almost defeated and do a self destruct!
I dont know why the heck this isnt posted, but Bombs are apparrently weak to Water as well. Dropped themf aster to Water spells than anything else I have at the moment.
All bombs are weak to Fire, just like they have been in the past FFs. However, unlike the past FFs, if you cast Thunder on the ones in here, they don't automatically explode.