This is a long story. Keep things semi-appropriate within forum rules of course. Other than that, go wild. Add as little or as much as you want.

I will start:

It's raining and there's a blue goblin sitting and eating a banana.

The banana isn't too happy about this, but it's a fitting end due to all the evil he committed during his life.

After awhile, the goblin's best friend, a small imp named Conrad, happened by. "Hey buddy," he said, "why so blue?"

"If I answer that, Conrad," the goblin replied, "will you tell me why you would be so impetuous as to ask that question in the first place? Here I sit in this imperfect weather, and I have to sit and listen to you impugn my gorgeous natural coloration. You imperil my sensitive kindness and sense of etiquette."

While the goblin is talking, the evil banana slips away, to do more evil things, like turning more goblins blue.

Skidding away on his own peel, the evil banana mustered up his best maniacal laugh, but was drowned out by the noise of the increasing rain.

The imp turned to his friend the goblin and remarked diffidently, " The banana is getting away, you know."

"That's Ok", the goblin replied with a smile, "it wasn't very appealing to me anyway."
The imp stared at him in shock. "I cannot believe the you made so abysmal a pun. Where are your sunglasses?"
"It's raining. Why would I wear sunglasses?"

The imp reminds him, "Medusa is coming. She always comes on Wednesdays. You need them so you don't turn to stone. Why here she is!"
Medusa scuttles up them. The blue goblin turns to stone. "Oh darn," she says.

"I wanted to ask him for a favour. Imp, ol' buddy... ol' pal... Are you doing anything right now?" Medusa asked, turning on the charm.
The imp looked away disdainfully, and in his fruitiest voice, he retorted, "I see no raisin to help you."