Floor mimic
The floor mimic is a monster introduced in Chip's Challenge 2. Normally, they have the appearance of a floor tile and follow Chip or Melinda at 1.25 m/s (5 m/s for 1 move, then waits 3 moves). However, if Chip or Melinda equip the secret eye, they have the appearance of a raised bump. Having the "smooth scroll" option checked (the default setting) shows their movement even without the secret eye.