any collaborations?

[spider13man]

you know.... between two bands..... that you guys know of?

[Akua]

uhh....M-FLO does collaborations a lot....but that's really not too surprising from a rap artist...collaborations seem to be a staple for most rap artists.

Between rock bands...I don't really know though. I know Psycho le Cemu did a song with MCAT but it's pretty cracked out.  and MCAT isn't really rock.
I've also seen TV live clips of Gackt and Ayumi Hamasaki (Silent Night), Gackt and Nami Amuro (Itsuka no Merry Christmas), and Kiyoharu and Ayumi Hamasaki (Masquerade)

[埒々]

Merry and Balzac made one track together (at least), and it's on the Calling single. Then Dollis Marry and Metis Gretel had a coupling CD where they switched vocalists for their most popular songs~

[Culo]

visual bands use to do coupling CD's... for example vidoll and kalimero did one, then due le quartz, kagrra and... i think syndrome? did another.

then there are some units by some members from different bands, dunno if you'd call collaborations though.
for example there's Houkago Club (eiji from codomo A/kibouya honpo and tonbimaru from guru guru eugakan), there's kakuu no hitobito (misa from babylon and mayu from lareine). and a lot more but i can't remember now... anyway those bands are formed only to release 1 CD or play live only once, for the most part.

[Do As Eternity 6]

beat crusaders did some couplings with asparagus and your song is good xD

[lovetrick]

Shelly Tic Cafe

[kaji no hana]

Poitrine x mello ^_^

[Champ213]

List of coupling cds I know of:
(Mostly it's just 1 or 2 songs for each band, sometimes they do an actual song together and sometimes they cover each others song)

Arienai CD [Poitrine x MELLO] (Covers)
Asymmetry [Vergil & Gagaku] 
Barazoku (Palette & ADOLF) (2 songs for each band and one joined song)
Cocktail Party (Sugar Folkfull & R-Cafe')
Collabodisc [Fatima& Vanilla] (Covers + 1 joined song)
Confinement Party (Ghost & Gimmiku)
Darker meets Deeper [Sugar& emmuree] (4 songs, 2 of them covers)
Dummy children & emmuree Livehouse CD
Ishyoku doumei [vidoll & kalimero]  (4 songs, 2 of them covers)
Junai Rankou Party (BLACK JACK＆jewelry) (joined songs)
Kessen (BLOOD &  Brand Φ)
Meihan shuugeki [Dollis Marry x Metis Gretel] (as mentioned)
Oni to shoujou no kuchiku blend...[Clutch & Catheline]
Shinkashuutou (Gift & Kinarura)
Shoudou ni kareta ohimegoto [Death Rabbits vs Crisis]
split our spirit [gargoyle & shame]
Tobe, tobe, oyuugi (MASK vs. Charlotte)
Tour Meteor Faded Film [Nega x Cannival Method]
Uchuugakuen (R.A.P. & Charlotte) (3 songs, including one joined)
Unique [HIZAKI grace project× +ISOLATION]
Hina vs. Cinammon
Warunori [Caress Anomaly VS Duke]
Yokoshima Hospital [SUGAR FOLKFULL & HISKAREA]
Youkai choujoudai kessen [Celia'xeno & Fiore]
Emperor- ∀NTI FEMINISM & Deadly SanctuaryEmperor
Young Man(Y.M.C.A)/De'I Know story [A⇔REAL & SHULA]
Figure 4 Leg Rock [Bloodly-clown＆放課後倶楽部]
昼下がりのジキルとハイド [Blast & deadman]
Chatear La Tour & Misery
D [DAS：VASSER & Due’le quartz]
Monster [King & Scar]
蝶乃舞 [LAYBIAL & Eze：quL]
La Vision [L'ysenore & Tinker Bell]
CHEAT/Monster, JUMP/Love is blind, JUMP/Love is blind [Medical Trance Peach & Orphee]
Refuse [NeiL & MIRAGE]
Mist of Rouge & Eze:quL
果実と美麗なる十字架 [NOi'X / Missalina Rei]
帝都大戦 [OPARTS & Karimero]
FRIENDS [PLASTIC / WAIL]
FRIENDS②
NEO SHAPED CHILDREN [Rentrer en Soi vs SULFURIC ACID]
Replace of Mind [Ring & Lagna]
Spirit Demo Tape[SCLATCH & BLOW]
Shelly Tic-珈琲店- [Shelly Tic CAFE]
LOST DAYS [SUTH:VISIOUS & Grudge Curse]
Stella Maria & Illumina
やすみなき恋 [Anemone & RED SUN]
ROMANTIST CARNIVAL [Karen & Mar'derayla]
戦友共闘歌 [Marusa vs. Girugamesh]
男尻 (Hanamuke & Gazette)
指きり/リザルト [Birushana&Veill]
｢回顧録～第五章～｣ Cover from COLOR [PIASS with Ra'S TESTARS]
緋い糸/ギル [Misa + CANDY]
静岡強制狩り～地元で引用？！～ [Tokyo Michael & SULFURIC ACID]
Water&OIL [Aikaryu～ VS Mizeria]

(Soory for the kanji I was too lazy to romanize all of them.)

[spider13man]

戦友共闘歌 [Marusa vs. Girugamesh]
know where i can get this one?

[Champ213]

http://www.megaupload.com/?d=6F33096U

Forgot who gave me that link. It's not uploaded by me, but it still seems to be working. So there. 

[spider13man]

http://www.megaupload.com/?d=6F33096U

Forgot who gave me that link. It's not uploaded by me, but it still seems to be working. So there. 

thanks!

[signal to noise]

http://www.megaupload.com/?d=6F33096U

Forgot who gave me that link. It's not uploaded by me, but it still seems to be working. So there. 

thanksss.
do you also have the one with Gazette and the one with Rentrer en Soi?

[Champ213]

Sorry no. But I doubt it's exeedingly rare. Try the J-music room on slsk or just request in in the request section. 

[Alice the Sister]

Boris and Merzbow
Acid Mothers Afrirampo (Acid Mothers Temple + Afrirampo)


Does Deflina Mariage count?

[spider13man]

beat crusaders did some couplings with asparagus and your song is good xD

assparagass

not mocking the band...........
the word sounds funny.....
like assassin


what a couple of asses....... lol.......