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Cannons are used to fire all kinds of projectiles in the Mario franchise, including characters. They have a more generic appearance and use than the Bill Blasters which specifically shoot out only Bullet Bills. Cannons are usually part of the environment and cannot be destroyed.
Super Mario series
Super Mario Bros. 3
Cannons make their first appearance in Super Mario Bros. 3 in the airship levels. Unlike Bill Blasters, which shoot Bullet Bills straight ahead, fixed cannons shoot their cannonballs diagonally. They are found on floors and ceilings and will continue firing when touched. There are also rotating versions of the cannons, which fire in two directions at a time, then rotate at a 45° angle. Some cannons eject Bob-ombs at short distances.
Super Mario 64/Super Mario 64 DS
Cannons, this time colored blue, are a vital gameplay element in Super Mario 64 and Super Mario 64 DS. There is at least one cannon found in ten levels in these games, as well as one secret stage. Each of the cannons that can be found throughout the games are under the control of Bob-omb Buddies. The player must successfully locate and talk to the Bob-omb Buddies in each level in order to access the cannon or cannons for that particular level. Until they do, the cannons will remain covered by a metal hatch with a picture of a Bob-omb Buddy on it, and will be inaccessible. The location of each Bob-omb Buddy becomes increasingly difficult to find as Mario progresses through the game. A common misconception is that only the cannon or cannons in the immediate vicinity of the Bob-omb Buddy will be unlocked when Mario talks to them. Fortunately, this is not the case, as every cannon in the level will be unlocked.
When a cannon has been unlocked, the metal hatch will slide away, revealing a square hole in the ground. In order to use the cannon, Mario needs only to drop down into this hole. The cannon will then rise out of the hole, and the player can use it to fire Mario to previously unreachable areas. When Mario has entered a cannon, a targeting reticle will appear on the screen, allowing the player to aim the cannon where they want Mario to go and when the target is locked, press the button to fire (or in the remake). The player should aim slightly higher than the area they wish to shoot Mario to, as the height of Mario's trajectory tends to gradually decrease after he is fired from the cannon. If the player collects a Wing Cap before entering a cannon, the player can fly around as Wing Mario immediately after being fired from the cannon, without needing to perform a Triple Jump to take off first. Cannons cannot be unlocked until after the first mission is completed.
There is also a cannon outside Princess Peach's Castle, though it is covered by a small metal grate as opposed to a metal hatch. The cannon can only be unlocked and used after Mario has collected all 120 Power Stars in the game. When used, the player will be able to access the roof of Princess Peach's Castle, where Yoshi and a hidden Wing Cap await. For the DS version, if 150 Power Stars are collected, Luigi can capture the green mini-game rabbit from the roof.
Super Mario Sunshine
In Super Mario Sunshine, there are very few cannons, most of which are operated by Monty Moles. These cannons are completely red in color and have three openings from which multiple Bullet Bills, Bull's-Eye Bills, and Bombshell Bills can be shot. They effectively take the place of Bill Blasters in this regard. When Mario approaches the cannons, the Monty Moles will cease firing Bullet Bills at him, and will instead begin to pelt Mario with multiple Bob-ombs, which Mario must diffuse (by spraying them) and then throw back at the mole to defeat it.
The first cannon that is encountered in this game is found on the upper west side of Delfino Plaza. When Mario first comes across it, a Pianta mechanic working inside it will tell Mario that it is unfortunately out of order, and therefore unable to be used at the moment. However, after Shadow Mario has kidnapped Princess Peach and taken her to Pinna Island, the cannon becomes accessible, and Mario is able to use it to shoot himself to Pinna Island to pursue Shadow Mario. From this point on, the cannon continues to act as Mario's only means of transport to Pinna Park, which he must return to every time he wishes to travel there. When Mario enters this cannon, he will automatically be shot to the island, without needing to aim first.
The second cannon in the game can be found near the entrance to Pinna Park, and is manned by a Monty Mole. In the episode "The Beach Cannon's Secret", Mario must dodge incoming Bullet Bills and make his way to the cannon, where he must throw Bob-ombs at the Monty Mole to defeat it. After it has been defeated, Mario must enter the cannon's opening to complete a Secret Level and return to Delfino Plaza. Mario can also use the Bullet Bills fired from the cannon as an opportunity to collect many Blue Coins, which are hidden under baskets that can only be broken open by Bullet Bills.
The third and final cannon in the game is found in Episode 1 of Noki Bay. In this episode, the cannon is positioned atop an extremely large cork, and continuously shoots out Glorpedoes which gradually fall down cliff faces and cause widespread pollution in the area. Mario must make his way to the top area of Noki Bay until he reaches the area with the cannon. Again, he must defuse Bob-ombs and then throw them back at the Monty Mole to defeat it. This time, the entire cannon will explode when defeated, and the cork blocking the waterfall will be dislodged, releasing the Shine Sprite for that episode.
New Super Mario Bros.
A type of Cannon called a Warp Cannon appears in New Super Mario Bros.. These cannons blast Mario or Luigi to a different world. They are usually unlocked by finding a secret goal in a level. Another type of cannon called Cannon Pipes appear, which, when entered, blast Mario or Luigi to an unreachable place in a level, similar to the slanted pipes from Super Mario World.
Super Mario Galaxy
Cannons reappear in Super Mario Galaxy. These cannons appear to be more advanced than the cannons from Super Mario 64 and they largely fulfill the same role as in that game. They also have much more precise aiming, since the player uses the to aim. The button fires the cannon and Mario or Luigi can get to high places and Power Stars. He is not shot in an arc, however. He will keep going in a straight line and can lose a life if shot out of the gameplay area, as he will not fall down unless he hits a surface.
New Super Mario Bros. Wii
In New Super Mario Bros. Wii, Cannons from Super Mario Bros. 3 that fire Cannonballs and Bob-ombs re-appear. The rotating sets of four cannons also appear (with a slight redesign), and one of them is larger and fires Giant Cannonballs. This one is usually found at the end of the airship stages before the battle with Bowser Jr., with one of their cannons being a Warp Pipe that doesn't fire and which characters must enter. Warp Cannons and Cannon Pipes from New Super Mario Bros. also appear. Another type of cannon which makes an appearance are cannons from the 1-Up Blast mini-games. Characters enter these cannons and aim before they blast themselves and attempt to pop balloons to earn 1-Ups.
Super Mario Galaxy 2
Cannons once again appear in Super Mario Galaxy 2. However, they only appear in Bowser Jr.'s Boom Bunker, where they are mostly used in place of Launch Stars. In the Throwback Galaxy, the cannon from Whomp's Fortress is replaced by a Sling Star. Cannons in these games are pretty much the same as the original, but there's a target to land on. If the hero manages to hit the center, he gets an extra life.
Super Mario 3D Land
Cannons appear in Super Mario 3D Land in several levels, with a similar function to Super Mario 64 and Super Mario Galaxy. However, it can now controlled by moving the Nintendo 3DS around, just like the binoculars. Cannons are also provided by Toad for either Mario or Luigi, and are often found in the level after his Toad House stage. These cannons are used by the heroes to gain access to the airship levels where either Boom Boom or Pom Pom appear to challenge them.
The cannons in this game share the same color scheme of that with a black body and blue outlines.
New Super Mario Bros. 2
Warp Cannons return in New Super Mario Bros. 2, though they act much different than before. In addition to a dark blue color scheme instead of a black color scheme, they gain access to 'Dash Mario' stages, which have Mario or Luigi continuously running through a short Subspace-esque setting dodging enemies and timing jumps to get through the level, with optional Coins to collect which also act as a guide to getting through the level. Collecting a row of coins will cause a audience to clap. Completing these stages allows Mario to gain access to other worlds.
Cannon Pipes also return from the previous games, acting much in the same way. These pipes first appear in World 1-A.
New Super Mario Bros. U
In New Super Mario Bros. U, Warp Cannons take an important role in Castles. After Mario, Luigi and the Toads finish the Castle, they will run up a flight of stairs and will jump inside the cannon and blast into one of the Koopaling's airship and start the Koopaling battle. Cannon Pipes also appear in levels and in the World Map, the latter of which is used to travel to other worlds. The Cannons from Super Mario Bros. 3 also appear and act in the same way; they appear in The Mighty Cannonship from Soda Jungle as well as in some challenges of Challenge Mode.
Super Mario 3D World
Cannons also appear in Super Mario 3D World in the Tank levels during cutscenes. They are used at the beginning of the levels near Sprixies to transport the player to the stage. They also appear as enemies. They most prominently appear in World Star-9 (Cosmic Cannon Cluster), and attack like in previous games. If a Brick Block is destroyed under a Cannon, it changes into a Cannon Box, which can be used to attack enemies and destroy cracked walls.
Donkey Kong series
Donkey Kong (Game Boy)
In Donkey Kong for the Game Boy, cannons appear in a variety of forms. Their appearance changes from level to level. In the Desert, the canons have a dated look taken from the Middle Ages (top image). They fire out bullets that look like Bullet Bills. If Mario gets hit by one, he gets killed. On the Airplane, cannons are made out of steel and look more contemporary, but their basic function is unchanged (middle image). In later airship levels, some cannons can change their angle of fire: they will now shoot diagonally and upwards (bottom image).
Mario vs. Donkey Kong 2: March of the Minis/Mario vs. Donkey Kong: Minis March Again!
Cannons later appear in boss fights against Donkey Kong in Mario vs. Donkey Kong 2: March of the Minis and its sequel Mario vs. Donkey Kong: Minis March Again!. To use them, the player must use the stylus to move the handle to aim. To fire, the player must tap the "Shoot" button.
Mario vs. Donkey Kong: Mini-Land Mayhem!
Cannons appear as common objects in the game, first appearing in Cannon Cove as the main object. They also appear as the main weapon against the final boss, like in the previous games. There are two types: Multidirectional Estatic Cannons and cannons that aim in a only direction, with the latter moving vertically or horizontally.
Mario vs. Donkey Kong: Tipping Stars
Super Mario RPG: Legend of the Seven Stars
Although no regular, harmful cannons appear in the game, Pot Cannons make an appearance as the first helpful cannons of the Mario series in Super Mario RPG: Legend of the Seven Stars. They appear in Land's End and help Mario to reach higher places.
Mario & Luigi series
Mario & Luigi: Superstar Saga
A cannon also appears in Mario & Luigi: Superstar Saga. After the crash of the Koopa Cruiser, Bowser gets stuck in it, and tells Mario and Luigi to get him out. They can not, however. Tolstar then tells them that he will help them getting Bowser out if they collect 100 Beanbean Coins. The Mario Bros. do get the 100 Beanbean Coins, but Tolstar betrays them. Mario and Luigi defeat Tolstar in a battle, but the green Starshade Bro. then comes out and lights the fuse of the cannon, sending Bowser to crash into Hoohoo Mountain. The Cannon then dissapears, allowing Mario and Luigi to pass.
Mario & Luigi: Partners in Time
Paper Mario: The Thousand-Year Door
A Giant Cannon appears in Paper Mario: The Thousand-Year Door, in the Fahr Outpost area. This cannon is vital for Mario in the game. He has to use it in order to shoot himself up to the Moon. The cannon itself is big enough that it can fit more than 100 Bob-ombs inside of it. The Bob-ombs are needed to fire the cannon off.
Mario Pinball Land
Mario Party series
In Mario Party 4 for the GameCube, four cannons appear in the 1-vs-3 minigame Hide and Go BOOM!, as the hiding spots of the three players. The fourth player lights the fuse to fire the cannons to send them flying.
In Mario Party 8, on the board DK's Treetop Temple, characters can use Cannons to blast to a space somewhere at the top of the map for five coins. On the board Goomba's Booty Boardwalk, Pirate Goombas used Cannons to blast any characters who land on the respective ? Space back to the start.
Cannons appear in Mario Party DS. They appear on the board, Bowser's Pinball Machine, where they are scattered on sides of the board. If the player lands on the space next to the cannon, they hop in it. Then they have to draw a line in the direction they want to land. Then they will land on a bumper that they bounce off. After they bounce off the bumper, they will land on a space. A Cannon also appears as a collectible. It is a board feature from Bowser's Pinball Machine. The figure can be unlocked by being launched by a cannon on Bowser's Pinball Machine three times.
Mario Hoops 3-on-3
Wario: Master Of Disguise
Mario & Sonic at the Olympic Winter Games
Mario Sports Mix
Cannons make an appearance in the Mario Sports Mix party game Bob-omb Dodge where players get to dodge the Bob-ombs that are shot out for two minutes. Also in the game, players can use Warp Cannons in the Flower Cup Tournament to unlock alternate routes.
Captain Toad: Treasure Tracker
Super Mario Maker
Cannons reappear in Super Mario Maker. They will fire Cannonballs once more. The game introduces a red variation that fires red Cannonballs which travel faster. Adding a Super Mushroom will make it larger in size and shoot Giant Cannonballs. Unlike Bill Blasters, items and enemies cannot be place inside a cannon, therefore it can only shoot cannonballs.
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