Super Soaker Central

I have a max D 6000 laying around my house. But i'm not sure if its fake or not, because of the colour. My colours are dark purple, yellow on the tank, and an orange nozzle. It seems none of the other max d 6000's have the same colour as mine

There are numerous color variations of the MD6k, and if it has a logo saying "Max-D 6000" along with "Super Soaker" elsewhere, it's most likely real. Fake MD6k's would not be common, if around at all since most fakes tend to be bad rip-offs of the CPS line. (with the only known exception being the "Super Shooter 2000", an accurate replication of the CPS 1000 with very similar performance and design)

Try pumping and firing with the cap off. If it works, it is most likely real, since Knock-Offs tend to be PR.

And somebody might have painted the gun, I do that with some of my things, and it looks better then the original did.
-Zeda