
A Warning message often occurred before a boss fight in the Mega Man series, starting with Mega Man X4, to indicate the incoming danger. It generally has an alarm sounding with the word "WARNING" appearing on the screen, sometimes a voice saying the word repeatedly. This was added in largely to mask the loading times of the disc-based games.
Mega Man series
Although the warning did not occur in any of the Mega Man classic games, it was included in the remake Mega Man Powered Up, when the player was about to fight one of the bosses. Similar to the Mega Man X series (exempting X7 and Command Mission), the warning generally appears before the pre-battle cutscene. Mostly because of the lighter and softer tone of the game and series, especially in comparison to the succeeding series, the warning is just composed of bells ringing in a siren-like manner and red flashing intermittedly before the "warning" tone appears in a slightly childish font with red and a barely noticeable yellow border and the announcer yelling "Warning" in a high-pitched voice before disappearing in a flash of light.
Mega Man X series
In this series, the warning segment plays before conversation with the boss battles, except in X7 and Command Mission (the latter due to the RPG nature of the game).
Although the warning did not occur in the original Mega Man X, it was included in the remake Mega Man: Maverick Hunter X. In that case, the warning logo appears in red at the center, with two pairs of yellow bars forming at the top and bottom, the outer bars forming together to form a scrolling message in red text saying "Target Approaching", and the inner bars, much thinner, just being above/below the Warning label itself and having three alarm blarings before the warning message ends.

Its true debut was in Mega Man X4, where it had a periodical buzz warning as the letters spell out "Warning", the screen flashes, and then the letters disappear again. It will continue to be used in this manner up to Mega Man X6. (In a prototype build of X6, a voice saying "Warning" was also included; this was removed in the final version of the game.)
In Mega Man X7, the Warning is depicted as a purple border with a flashing red Warning sign in the middle, as well as the announcer announcing the word twice. It is also the only standard Mega Man X game to place the warning immediately before the battle instead of simply before the pre-battle scene, something that would be more prevalent in Mega Man Zero onwards.
In Mega Man X8, the Warning is depicted as a flash of red as well as the warning label popping up, with the announcer announcing the word twice.
In Mega Man X: Command Mission, the warning letters will fly by before forming the words as the alarm starts blaring. Because of the nature of the game being an RPG, it also takes place immediately before the battle instead of the pre-battle cutscene.
In Mega Man X DiVE, a "Warning" indicator appears before a boss fight. The warning logo resembles those from Mega Man: Maverick Hunter X, albeit with a different font choice for the Warning sign, and the lack of animation for the text in the yellow bars. In addition, a "Caution" message appears before mid-bosses, appearing as a red "Caution" sign with a alert symbol next to it.
Mega Man Zero series

Starting with the Mega Man Zero series, the warning will play immediately before the boss battle starts, instead of prior to the cutscene where the boss arrives. In each installment, the warning sign appears with the letters forming before lines appear above and below the warning sign, and then a three-boop sound effect is heard before the warning disappears.
Mega Man ZX series

Like in the Mega Man Zero series before it, the warning will play immediately before a battle starts. The letter W in the message has a design similar to Dr. Wily's mark.
In Mega Man ZX, the warning label appears with the screen briefly flashing red, and the text becomes affected in static-like manner as a long drawn-out alarm is heard.
In Mega Man ZX Advent, the warning label appears with the screen flashing red twice in sequence to an alarm blaring.
Mega Man Star Force series

While isn't used in similar manner to the mainline Mega Man games, the Warning sign appears as a random notification shown on the Hunter-VG in Mega Man Star Force 3. Players will randomly receive this message when traversing the Wave World, serving as an indicator of a Giant Virus battle. It appears as a large red box with a white blinking "Warning" sign, as well as a siren and a robotic Warning voice announcing it. When the Warning sign appears, the players are unable to Pulse Out from the Wave World as the Warning siren and voice goes faster and faster until the player is forced to battle.
Other appearances

When playing as Zero in SNK vs. Capcom: SVC Chaos, a warning will replace the stage's name before boss battles.
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A warning message appeared before a boss battle in Street Fighter × All Capcom.
In the Rockman X DiVE event stages from Tower of Saviors, the warning from Rockman X DiVE appeared in place of the game's warning.
In the Taiwanese version of Shironeko Project, the warning message was used in the trailer from the Rockman X DiVE collaboration and appears in the background from X's Awakened Photo.
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A warning appears in the Super Smash Bros. series when a new fighter appears to challenge the player upon meeting certain conditions for unlocking the fighter.
Gallery
Trivia
- The warning from Mega Man X6 was planned to be voiced during the game's development.[1]
See also
- Ready