Bushes are very important in The Great Emoticon. They’re everywhere in the world, and provide lots of opportunities for drops. There’s even an organization inside the game who manages them - they call themselves B.U.T.T.S. (Bush Utility Tidy & Transfer Syndicate).
Bush spies were clearly the next step in the process. Bush Spies are little spy minion robots working for The King. From a distance, they appear to be exactly like regular bushes, but if you get too close, they’ll pop up and immediately charge at the player. This adds an element of uncertainty and danger to the player’s careless bush-whacking.
And final animation cycles: