The Power Rangers is the nickname PewDie gives headless statues in the game Ib. The Power Rangers frequently come alive and attack Ib. The Power Rangers come in several colours. The Power Rangers first appeared in episode 1 of PewDie's Ib gameplay & commentary series.
Cry has also played Ib. Coincidentally, he also referred to the statues as ThePower Rangers.
The Power Rangers may be related to the Untrusted Statues, as they are headless statues which come to life and attack PewDie, something that he has always suspected of the Untrusted Statues. However, PewDie has not made any connections between them.