For a while now I've been scavenging the internet for any stray reuploads of the discography, the rarer the better. And while there is a post here about where to find some, it hasn't been updated as far as I'm aware, along with some of the ones linked have been taken down cus of copyright. But got quite a few saved, and may be interested in a few variants of some too(Chichi Wo Moge does have quite the amount of them for example).
So far I've gotten...

- 00F no Theme (Folgore)
-Bakeru!!! (Kanchomé)
- Boy... (Danny)
- Boku Wa Koko Ni Iru (performed by Rino, Gash With Best Friends album)
- Chichi Wo Move (Folgore)(likely the full of the main version, also have its instrumental and the Electric Arena 2 version cus I like it)
- Coral Q no Kenkei Taisō (performed by Command Que, if only there was a full version of the character singing it, I love the VA's delivery of the lines)
- Destiny Ano Hi Ni Kaerou (Sherry) (also its instrumental)
- Doki-Doki DE-coration (Patie and Gash)
- Future! (Gash and Kiyo)
- Gracious&Groovy (Sunbeam and Umagon)
- Happy Tomorrow☆ (Megumi)
- Heart no Compass (Suzume Mizuno/Suzy)
- Hijou no Victory (Brago) (quality of this one seems questionable cus the start drums feel sorta bass boosted)
- Hikari (Megumi and Kiyo)
- Hikari no Prism (Megumi)
- Jungle Jim no Kettō (Gash, Umagon and Naomi)
- Kasabuta (Kiyo version, different instrumentation from the opening version)
- Koi no Lesson 1-2-3 (Big Boing and Folgore)
- Kokoro no Chikara (Kiyo)
- Kuroi Kasebi (Sherry and Brago)
- Love Fanfarre (Folgore)
- Love Is Living In My Heart (Li-en)
- March Of The Tender King (Gash)
- Mienai Tsubasa (Gash version, like Kasabuta it also have a different instrumentation)
- Muteki Folgore (Folgore and Kanchomé)
- Never Say BOIN BABY (Big Boing)
-Roman☆Paradise (Megumi and Folgore)
- Tomo Yo (Ted)
- Treasure Fighter (Kiyo)
- Tsutaete (Reira)
- Umagon Rock (Sunbeam, Umagon and Gash)
- Uwasa no Pretty Girl (Tio)
- Very Melon (Victoream, Gash, Tio and Kiyo)
- Watashi No Time (Megumi)
- Watashi Wa Patie (Patie)
- Ya-ku-so-ku (Suzy and Kiyo)
- Yakusoku no Hoshi (performed by Rino)
- Yasashi no Chikara (Megumi and Tio)

As for adjacent album songs listed on the wiki...

The ones on that Aya Ueto ("Afuresō na Ai, Daite", Personal 2004 Summer(which is different from the ending version by Sherry's VA), Namida o Fuite)
- Love☆Rocket (by Eri Kitamura)
- Kimi ni Kono Koe ga Todokimasu yō ni (Takayoshi Tanimoto)
- Mienai Tsubasa (Takayoshi Tanimoto)
- Sai-kai (recent release by Ikue Otani as Gash)

I do plan on getting more of them if I can find them, along with editing their metadata so media players have them all neatly organized by album ALONG with them having the lyrics included in there, in case some players allow for that for read-along sake. Something to note is that that one post did help me find a few, while others are scattered throughout YouTube and SoundCloud.

The sung soundtracks