Mega Man V[a] is a video game published by Capcom for the Game Boy handheld game console. It is the fifth game in the Game Boy version of the original Mega Man series. The game follows the adventures of the protagonist Mega Man as he must defend the Earth from a group of powerful robots from outer space called the Stardroids. Mega Man V is unique among the Game Boy Mega Man games as it features original bosses rather than recycling those from the Nintendo Entertainment System (NES) Mega Man games.

Mega Man V is an action platformer in which the player selects stages in a non-linear fashion and acquires the weapon of each boss defeated to use as their own. Although it plays nearly identical to other games in the series, Mega Man V features a new default weapon (the powerful "Mega Arm") and introduces Tango, a new assistant character. Mega Man V received a positive critical reception. In 2013, Mega Man V was made available on the Virtual Console of Japan's Nintendo eShop for the Nintendo 3DS. It was released in the North American and PAL region eShops the following year.

The gameplay in Mega Man V is largely similar to other games in the Mega Man series. As the protagonist Mega Man, the player is presented with a set of action and platform-style levels to complete. Mega Man's primary weapon is his staple arm cannon. However, rather than being able to charge and fire a more powerful blast with the trademark Mega Buster, the Mega Arm is used in essentially the same manner. Charging up and releasing the firing button causes Mega Man's arm to detach, strike an enemy, and then reattach. Destroying the boss at the end of each stage adds its special weapon to Mega Man's arsenal for the rest of the game. As each boss is weak to specific weapon, the player is encouraged to complete some stages before others. These bosses are known in game as "Mercury", "Venus", "Mars", "Jupiter", "Saturn", "Uranus", "Neptune", and "Pluto", named after the first, second, fourth, and fifth through eighth planets in our Solar System. Pluto was, at the time the game was made, considered a planet, unlike from 2006 and onwards. Terra is named for the Latin word for Earth. Defeating some bosses will allow the player to access Mega Man's robot dog Rush, who can transform into useful "Coil" and "Jet" modes for easier stage navigation. Mega Man V also introduces Tango the cat, another robotic pet to help Mega Man. Like the bird Beat from previous installments in the series, Tango will appear on the screen when summoned to attack enemies, transforming into a buzzsaw and ricocheting around the room. As in Mega Man IV, the player can return to Dr. Light between stages to purchase items using "Power Chips (P-Chips)" scattered throughout the game.

Mega Man V breaks an established trend in the Mega Man games released on the Game Boy handheld. Prior to its release, games in the series on the system featured a set of four "Robot Masters" boss characters from their titular NES counterpart and a second set of four from the succeeding NES game in the series. Mega Man V instead features entirely original enemy characters with the Stardroids, who are all named after the planets in the Solar System: Neptune, Mercury, Venus, Mars, Pluto, Uranus, Jupiter, Saturn and Terra (Earth).