Which Robot Master in Mega Man 2 can stop time?

Flash Man is the Robot Master in Mega Man 2 who can stop time. His signature weapon, the Time Stopper, freezes time for a limited period, allowing Mega Man to move while most enemies and hazards remain suspended.

Flash Man is one of eight Robot Masters created by Dr. Wily for Mega Man 2, released in Japan in 1988. The other bosses are Metal Man, Air Man, Bubble Man, Quick Man, Crash Man, Heat Man, and Wood Man. Each Robot Master has a themed stage and a weapon that Mega Man receives after victory.

The Time Stopper is powerful but deliberately limited: it consumes weapon energy, and the original game does not allow it to be used freely against every boss. Flash Man’s ability is also distinct from Bright Man’s Flash Stopper in Mega Man 4. Bright Man’s weapon freezes robots through a flash-triggered safety mechanism, whereas Flash Man’s power is explicitly based on stopping time.

The game’s other time-themed character is Quint from the Game Boy title Mega Man II, but Quint is not a Robot Master from Mega Man 2. Flash Man is therefore the canonical answer for the NES game.