Robo gave me the idea, and then I wrote the story.
Zim mixe up a potion from a few ingredients he'd reasearched. He was going to use it to make the Tallest love him as an Invader. He WAS the best invader. He mixed it up and got it ready. Now all he needed to do was get it to them.
One day, during a call to the Tallest, he said he was coming to the Massive. When he arrived, he tried to sneak it into their drinks, but a pilot nearly caught him. He ended up spilling the whole potion into Red's drink.
The next morning, he knew the potion would effect them. He wondered if it would work. It probably didn't, since Red fell in love with him.
AND THAT IS THE END OF THIS VERY SHORT STORY