Tango

Tango (タンゴ) is Mega Man's feline pet created by Dr. Light in Mega Man V. It rolls toward the screen to attack enemies.

Mega Man 10
Tango appears in Mega Man 10 as Auto's assistant at the shop when playing as Proto Man.

MegaMan Battle Network series
In the MegaMan Battle Network series, Tango's counterpart is a Navi Customizer program that appear once per battle in multiplayer NetBattles to heal the player and give him a barrier.

Mega Man & Bass CD data
A supporter robot that is remodeled from a pet robot. It rolls toward the enemy to attack.

"Meow Meow."

Good point: Rolling-stone

Bad point: Creature of moods

Like: Mistletoe

Dislike: Rush

Trivia

 * In the CD Data of Tango, his good point being "Rolling-stone" is probably based on the famous 60's Rock Band "The Rolling Stones." It could also be a reference to the way Tango attacks.
 * Tango dislikes Rush, more than likely because Tango is a cat-robot and Rush is a dog-robot.