I really really really did not like Cheese Sandwich. His mane and tail bothered me the entire episode because it is BROWN. I just didn't believe in him as a party pony, even when he was being a party pony it didn't ring true to me which is weird considering the voice actor. His colouring really bugged me the whole time, okay yeah the colour of (american) cheese? I guess?
He just didn't work.
Pinkie was of course wonderful.
I think he was brown maned because Weird Al has brown hair, and they wanted to keep a resemblance to the VA. There's a screencap I have here, from the episode, that shows Weird Al as himself from the 1980s, but as a pony. It was in the lineup scene here (I circled him in red):
So that's why I figure they kept the coloring simple.
Also, I loved that, since Weird Al's stuff from the 80s is still my favorite.
“I've noticed that about your people, Doctor. You find it easier to understand the death of one than the death of a million. You speak about the objective hardness of the Vulcan heart, yet how little room there seems to be in yours.” - Spock, The Immunity Syndrome
Leonard Nimoy: 1931 - 2015