Blue Ninja

Blue Ninja is a hacked user. He is the first hacked user the player fights, in Pixel Plains. He uses shurikens and smoke bombs. At first, he simply throws shurikens at the player, but when injured, he starts to circle the player, throwing shurikens and eventually launching a smoke bomb. If it hits, he becomes invisible. Either way, he hides in a corner, then spawns viruses and becomes visible.