Not sure if you can insert object types into an array in C2.
A work around you be to set a random number and pick a specific object to create depending on the result.
Something like
r > Set value to int(random(3))
r = 0 > create object1
r = 1 > create object2
r = 2 > create object3
^^^^
Thanks dude. This was genius. I was even able to assign the types of enemy's that make sense for each platform using the same logic.