Since we're talking Pokémon, here's one of my favorite Japanese songs.

[The Great Saiyaman]

I think it's a shame that so much of the original music was lost when the show was dubbed over. Among the songs that Western audiences never got to hear was this very happy-go-lucky ska number sang by the show's Antagonists.

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Maemuki Roketto Dan "Team Rocket, be optimistic"

And here's what it says:

Jessie, James and Meowth: Pappa parapara paraparapara!
Pappa para pappaa!
(Wobbuffet!)
Pappa parapara paraparapara!
Ruh-ray-rookie-Roketto dan!

Jesse and James: We finally make it back to our hideout
A worn out Team Rocket
Meowth: Why were we defeated today?
J&J: Okay!
Jessie: Let the review meeting begin right away!
J&J: Let's glance back to the result of today's fight
Meowth: We should have done this when that happened....
J&J: Okay!
Jessie: Review meeting is hereby completed!
J&J: Five seconds is enough moping time
What's more important is food for tomorrow! YAHOO!

All three of them: Our motivation is rising, rising, rising, rising up!
Hope is facing, facing, facing towards us
Team Rocket, be optimistic!
(Wobbo wobbo, Wobbuffet!)

J&J: Give us more scenes! And longer lines!
Meowth: While you're at it, change the title!
J&J: Yes!
James: "Go Forth, Team Rocket!"
J&J: Someday we'll surely be the lead roles!
And then we'll be superstars!
Meowth: On top of that, we'll have the People's Honour Award!
J&J: Yes!　
James: Go forth, Team Rocket!
J&J: Those are our meager, humble wishes
All our fans, please cheer for us! YAHOO!

All three of them: Team Rocket is creating a bright future!
You can't live without us, Ruh-ray-rookie Roketto dan!

Our motivation is rising, rising, rising, rising up!
Hope is facing, facing, facing towards us
Facing-forward Team Rocket!
(Wobbo wobbo, Wobbuffet!)
Pappa parapara paraparapara
Pappa para pappaa!
Pappa parapara paraparapara
Ruh-ray-rookie Roketto dan!
Team Rocket be Optimistic!
(Wobbuffet!!)

[neatoman]

https://i.kym-cdn.com/photos/images/newsfeed/001/046/487/bbe.png

[Voltron]

I bet they use your ipod for the trouble makers at Gitmo.

[ZariusTwo]

Post Team Rocket's Rockin or get out

[The Great Saiyaman]

Post Team Rocket's Rockin or get out

I'll post a better one "Roketto dan yo eien ni" (Team Rocket Forever) which also appeared in the "Jigglypuff song" episode.
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The lyrics were written by the guy who came up with Team Rocket, Pokémon scriptwriter Shudo Takeshi. (Brock is named in his honor)

[Allio]

Favorite Japanese song: ice cream syndrome

Favorite English song: lullaby