What are all these giant version of monsters randomly spawning?

With the prize orbs in the bonus stage, are they supposed to be lootable, or do you have to break them with basic attack, and then (manually) loot?
In the few seconds before the orbs dissappeared I was just mashing all keys and never figured out exactly what worked and what didn't. It seemed like pet loot didn't work; maybe you have to manually loot. Lag at the time was limiting and confusing things too. The orbs actually seemed to take evasive action when I approached them.

The flying ones are absorbed by your character upon contact, the ones that drop from the chest monsters (which I believe are updated Mimics) have to be manually looted.