The main theme (and 2nd stage BGM) of Go! Go! Hypergrind, "Jam Jam Hype!?" but sounding very Sega Genesis.

Released in 2003, this was a unique collaboration between Atlus (to be specific, Team Poponchi) and the Ren & Stimpy crew. This was the only game Team Poponchi would create though, and despite it being developed in Japan, it was never released there. Additionally, there's no voice credits in the game, but Vert (the big grey tiger man) sounds an awful lot like a Mr. Steve Blum.

GRIZZLY, the band behind Jam Jam Hype!?, would sadly break up shortly after the game came out due to problems with the band's agency, only having done a small handful of songs. Rin Kozue/Friedia, the band's lead vocalist, has a video talking about her time with GRIZZLY. Here's hoping one day she can hype it all up once again (jam it hype it up!).
https://www.youtube.com/watch?v=UqafTyq075M

Jam Jam Hype!? (Genesis Remix)

I think its the whole OST of Go! Go! Hypergrind but only the first one. I think theres a second one. anyway it slaps. I downloaded all of these from youtube, along with the cover art.

This plays when you've finished a level or part of a level and it tells you your score compared to the others.

Go Go Hypergrind OST - Ranking Results (16)

I think its the whole OST of Go! Go! Hypergrind but only the first one. I think theres a second one. anyway it slaps. I downloaded all of these from youtube, along with the cover art.

This plays when you're on stage, but not actually playing yet.

Go Go Hypergrind OST - Story Mode Selection (14)

I think its the whole OST of Go! Go! Hypergrind but only the first one. I think theres a second one. anyway it slaps. I downloaded all of these from youtube, along with the cover art.

This plays offstage, and in the shop.

Go Go Hypergrind OST - Offstage (13)

I think its the whole OST of Go! Go! Hypergrind but only the first one. I think theres a second one. anyway it slaps. I downloaded all of these from youtube, along with the cover art.

This plays in the credits.

Go Go Hypergrind OST - Creature (11)

I think its the whole OST of Go! Go! Hypergrind but only the first one. I think theres a second one. anyway it slaps. I downloaded all of these from youtube, along with the cover art.

This plays in Jungle.

Go Go Hypergrind 08 OST - Full Metal Jungle (08)

I think its the whole OST of Go! Go! Hypergrind but only the first one. I think theres a second one. anyway it slaps. I downloaded all of these from youtube, along with the cover art.

This plays in fantasy studio.

Go Go Hypergrind OST - Electric Party (05)

I think its the whole OST of Go! Go! Hypergrind but only the first one. I think theres a second one. anyway it slaps. I downloaded all of these from youtube, along with the cover art.

This plays in toon city.

Go Go Hypergrind OST - Rattle Toy (04)

I think its the whole OST of Go! Go! Hypergrind but only the first one. I think theres a second one. anyway it slaps. I downloaded all of these from youtube, along with the cover art.

This plays in the tutorial level.

Go Go Hypergrind OST - Walkure (03)

I think its the whole OST of Go! Go! Hypergrind but only the first one. I think theres a second one. anyway it slaps. I downloaded all of these from youtube, along with the cover art.

This plays in the cutscene thing when you start the game.

Go Go Hypergrind OST - Jam Jam Hype! (01)

I don't have more space on here to upload, so look at my other places for more music.

I OWN NONE OF THE SONGS I UPLOAD HERE. I am simply uploading them because they arent already on sound cloud and I want to listen to them.

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