MORE INFO ON GEOGRAPHY
Meadow- In the meadow is a pond in the middle and around an acre of the meadow. It seems peaceful, if you ignore the aggressive cradily, sunflora, vileplum, oddish, and beedril. Normally, oddish are just lazing around the meadow- other pokemon only come out if you disturb their peace or the capitol sends them after you.
Beach- A beach with amazingly soft sand. The soft rolling of the ocean onto the banks makes this area seem like a daydream. The water is SALT WATER, however- don't try to drink that! Many harmless fish pokemon await being caught here. Its a good source of food! Watch out for the occasional sharpedo and tentacool, though!
Jungle- Most of the arena is covered in deep jungle. Vines are not uncommon, and poisonous creatures are the norm. Victreebell, parasect, croagunk, and foogus are not uncommon sights. If you stay aware, you should be fine, but don't get caught off guard.
'Village'- The village is populated by a few huts, a dock, and a fireplace. The huts are relatively safe except for the occasional spinarak.
Mountain caves- Dangerous caves are the easiest way to navigate yourself down the mountains. Noibats, zubats, golbats, ghastly, and duskulls make traveling through the caves hell.
More info on the cornucopia: The cornucopia itself is made out of bedrock, and thus can not be destroyed by lava. Keep this in mind!