OST: what a terrible child am I-big Jack horner VS Dr Fetus (puss in boots: the last wish VS super meat boy) Partially guessed by @Jershy and @StarRiskLtd
Track art: a pie sits in the middle of the screen and on the pie is a black top hat, from the left a black suited arm with a black glove is flipping off the hand on the right, which wears a dark purple sleeve and its thumb is stained purple, it is giving a thumbs down
Music: a mixture of the boss music from one of the combatants boss stages and the other combatants closer themes with a few nods to a certain rhyme involving a plum pie
OST: PUMPING HOT NOODLE BURGERS!-the noise VS Noodle burger boy (pizza tower VS big hero 6) Partially guessed by @Jershy and @Josemantor
Track art: a cheese burger with a bun made of Noodles sits in the middle of the screen. cheese pours down onto it from above. on the right of it a hand an arm covered in a pale yellow glove and bright yellow sleeve holds a bomb and on the right a Tan hand with a hand that is similar to how a mitten is designed gives a thumbs up
Music: combination of their respective theme songs
OST: the same episode,always in the rain-Cartoon Cat VS Murphy Law (Trevor Henderson VS SCP) partially guessed by @StarRiskLtd and @Jackal the 2nd
Track art: an old box Television sits in the middle of the screen, on top of it alongside the antennae a pair of black cat ears sit. on the screen amongst the static a gray fedora is shown. in the background a noodle like black arm topped with a cartoon glove reaches out towards the TV but on the other side a arm covered in a gray suit sleeve extends its hand covered in a black glove and holding our heroes .44 magnum shoots at the arm
Music: it starts out similar to a noir show but over time it becomes more foreboding and dark. at the end it switches to a light hearted version of the beginning theme before stopping. low radio static can be heard in the back ground