In Dirty Pair Flash, Mughi appears as a smaller mute black cat.

If you're in big trouble, call the World Welfare Work Association or WWWA for short. They will send out a team of highly trained and capable agents called Trouble Consultants who can solve your problems. But if the team they send you is the Dirty Pair, solving your problems could come at the cost of a lot of collateral damage.

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In August 2020, he was diagnosed with terminal stage 4 cancer, and has been undergoing chemotherapy treatment.

The Dirty Pair are travelling to the planet of Ookbar in search of a missing girl. Kei and Yuri have traced Missinie to the forest of Nolandia, but their investigations have stalled thanks to the less-than-helpful Chief of Security. But the Dirty Pair have never let a little bureaucracy stand in their way. 
(Source: AniDB)

Agerna is a planet rich in Vizorium, the one mineral necessary to space travel. So when a series of mysterious attacks on mining operations has the governments of the world pointing fingers and blaming each other, the World Welfare & Works Association naturally sends in their top agents to investigate. But are the lovely angels up to the task of stopping a mad scientist bent on taking a long dormant alien race to its final evolutionary form? Throw in a thief who's hunting a bottle of World War II-vintage wine and it's a safe bet that nobody on the planet is safe. It's more chaos, more mayhem and even more destruction than ever before as the Dirty Pair take on their wildest case yet! 
 
(Source: ADV Films)

Michael McConnohie is an American voice actor, writer and director who has provided many voice roles in movies, anime, and video games. He and fellow actress Melodee Spevack run a production company called VoxWorks. Some of his major works include the Narrator on Bobobo-bo Bo-bobo and Hunter x Hunter, Azulongmon in Digimon, Gork in Masked Rider, Keiichi Ikari in Paranoia Agent, Rolf Emerson in Robotech, Manzou the Saw in Samurai Champloo, Cosmos and Tracks in Transformers, Hot Shot / Ironhide in Transformers: Robots in Disguise, D in Vampire Hunter D, Chief Inquisitor Margulis in Xenosaga and Charles zi Britannia in Code Geass.

(Source: Wikipedia)

It's Chief Gooley's worst nightmare come true. The Lovely Angels are back on the job, but this time the 3WA's Central Computer has assigned them two cases at the same time: investigate a space liner explosion in which three hundred people died, but no one`s come forward to claim any insurance money; and find a missing scientist and his family. 
Could the two cases be connected? Only the Central Computer knows and it's not talking. So it's up the Dirty Pair to get down and dirty and solve the puzzle before time runs out for a grieving grandfather, his family and the universe! 
(Source: AniDB)

Set in the future Kei and Yuri are Trouble Consultants for The 3WA. Code Named "Lovely Angels", but, they are known throughout the galaxy as The Dirty Pair. They always solve their case, but, not without causing collateral damage and mayhem.
 
(Source: Anime News Network)

Released direct to video in Japan after the original TV series was canceled, this OVA is actually the final two episodes (25 & 26) of the TV series.

Kei and Yuri were originally junior auxiliary agents in the Worlds Works and Welfare Agency (W.W.W.A. or 3WA for short) when the two were paired together under the codename "Lovely Angels." Kei was coming off her fourth probation for something she had done, and Yuri's dating exploits were common knowledge, not to mention the two had an instant dislike for each other when they met. 
At first, Kei and Yuri refused to work with each other, and Kei even resigned from the 3WA. Afterwards, the two continued to work together, although they earned their nickname, "the Dirty Pair" because of all the collateral damage the two (unintentionally) cause in the completion of their cases. And even though the two now get along with one another, they continue to bicker and complain to each other. 
Although it is often said that these are younger versions of the original Lovely Angels Kei and Yuri, in truth this series is an alternate universe telling of Dirty Pair, set in the years 2248-49. 
(Source: Wikipedia)