But the fact that he is going through a divorce is a sort of pink flag.

There is a pink adhesive you can use to install; it's removable.  

I did buy a house with a bedroom with dark blue walls that I was just was too tired to paint (after covering the hot pink).

They even painted the interior pink without informing me.

Not even red flags, but a few pink ones. 

Something like this:If it's long and fuzzy and pink - it used to be a cucumberIf it's lumpy and fuzzy and green - it used to be macaroni and cheese...Care to add to our list? 

You probably need to file an eviction, but check your laws to see if you can do this -  prior to filing an eviction I've always posted a big pink or yellow pay or quit notice on the front door and front window.  

We're looking at a property at the moment, the retiring landlord has painted it brilliant white throughout.....sigh.Some tenants have a habit of looking at rental property as if they own it, and white walls just encourages them to 'customise' the property to how they want.Which is exactly a friends rented house ended up with 1 pink room and 1 blue room.

Also, the pink bathroom.

. :) But, it is more likely you may need to find an animal with a similar body type and attach a custom horn and paint it purple, pink, rainbow or whatever color/s you choose.