Danny Phantom

Chem junkies-bane vs the blight (DC vs DEAD BY DAYLIGHT) guessed by @Spicelolman

A black mask with white markings is covered in a brown ragged hood part of the mask is torn away showing a long extended jaw with orange liquid seeping out on the other side of the mask there are green tubes on the neck pumping a strange chemical

Music description-it starts out slow and scary like the ambiance in a horror game and over the fight it gets faster and faster until it switches beat after halfway it is now more action sounding while still retaining the creepy vibes

Pint-sized package heavy power Scrappy Doo vs meap (Scooby Doo vs Phineas and Pherb) partially guessed by @AidenRulz0828 and @Spicelolman

A small blue dog collar with the letters sd (in lower case as shown) on it in gold is being hit by a large seemingly motorized space ship with a small mustache laying on the inside

Music description-it starts off as an action type cartoon theme and slowly switches to a more intergalactic vibe as the song goes on before ending with the end of a famous theme song

My childhood forged by them-Scooby Doo vs Danny phantom vs little ropo vs moosecraft vs yaboiaction vs kaos (... vs ... vs little club vs ... vs ... vs skylanders) 2 guessed by @AidenRulz0828

A small cartoon depiction of a brain sits in the middle of the screen and items are flying out a red cap with yellow highlights flies out in a black and red blur,a stylized ghostly letter D flies out in a blur of green,a blue dog collar with a golden dog tag with the letters SD (in capital letters) flies out in a brown blur,a tub of "moose milk" flies out in a blur of white,a yellow YA in a circle flies out in a yellow blur,in the middle a figure flies out with a familiar mark on their head the figure is surrounded by a purple and black aura

@Frenchhoaxwide @Spicelolman @Bunny Cat4 Care To Guess?