This is a very weak enemy, intended for rewards stage. In fact, you could make a good case for this being the weakest metal enemy in the entire game, not only for its HP, but for its attack power, attack speed and the lack of movement. Take note that this is a metal enemy.
This enemy, Angry Sun and Drummer Doge are the only stationary enemies in the game, due to the lack of movement speed.
This enemy is actually a reference to the company "Amazon", not only in terms of how they deliver their parcels usually with overly-large boxes, but the enemy actually has the word "wamazon" on the side of it.
This enemy shares a similar appearance with Cat Bros.