Canodumb

Canodumb (キャノーダム) is a virus in the MegaMan Battle Network series made up of a cannon on a base. These viruses cannot move, but attack when MegaMan moves into the same column as them. The Cannon series of Battle Chips can be obtained with Canodumbs. 

Canodumb Family
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Canodumb

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 * Standard Canodumbs are green and have 50 HP in the first game and 60HP in later games. When a NetNavi stands in front of them, they send out a cursor. If the cursor comes in contact with a target, it will fire its cannon down the row of panels.
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Canodumb2

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 * Canodumb2s are blue, have 90HP and work much the same as Canodumbs except that their cursors move fast and deal more damage per hit.
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Canodumb3

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 * Canodumb3s are red and have more HP. Their cursors move much quicker than Canodumb2's.
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CanodumbΩ

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 * CanodumbΩs (appear only in MegaMan Battle Network 3) have an orange color and are very upgraded compared to any other Canodumbs.
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Battle Chip
The Cannon series is among the first obtainable battle chips, and stayed throughout the whole series. They are in all of the standard folders. They do damage to the first target lined with the user.

Cannon
A standard battle chip. The starting folder in each game always contains a few of these. Causes 40 damage in all games.

HiCannon
A blue Cannon that causes 80 damage. 60 in MMBN2-3

MegaCannon
Shortened to M-Cannon, is the strongest standard chip in this family. Causes 120 damage. 80 In MMBN2-3

DarkCannon
A Dark Chip appearing in Battle Network 4. Its damage dealt is equal to the difference between your current and maximum HP, similar to an unrestricted ranged Muramasa. However, as with all Dark Chips, it has a glitch after being used, and this one drops all of MegaMan's Buster Stats to 1.

ZetaCannon
Shortened to Z-Cannon, is a Program Advance. It's created by combining three Cannon chips in code order (like A, B ,C). Z-Cannon1 is created with three Cannons, Z-Cannon2 with three HiCannons, and Z-Cannon3 with M-Cannons.

OmegaCannon
O-Cannon is almost same as ZetaCannon, but is formed from the A B C D and E codes, and lasts longer.

Powered Cannon
This cannon is activated by combining Shotgun K + CrossGun K + Spreader K + Mega Cannon K and only appeared in MegaMan Battle Network. This creates a massive cannon firing in a spreader pattern.

GigaCannon
ZetaCannon changed to GigaCannon in MegaMan Battle Network 4, but it works differently. Instead of shooting multiple Cannons, it does a single hit of massive damage. In MegaMan Battle Network 6, it spreads to the 8 panels surrounding the point of impact as well.

Trivia

 * Unlike most chips that come from Viruses that disappear in proceeding games (which become a 'black' version of the virus on the chip with damage usually in between the 3) all 3 cannons stayed in the entire series, despite the Canodumb virus being replaced with the Canoguard virus, a seemingly 'evolved' version of the Canodumb, in MegaMan Battle Network 5.


 * Canodumb also had short appearances in the anime MegaMan NT Warrior. When the Cannon Battle Chip in used in the anime, it can be used either as a cannon in the NetNavi's arm or summon a Canodumb.