First note: I have an update policy. I'll only update if I get two or more new reviews for each new chapter. That way, I can be sure that people are actually reading it. I ACCEPT ANONYMOUS REVIEWS.
Second note: This is the disclaimer. I do not own Harry Potter or Invader Zim, nor do I own any of their respective characters. Thank you.

Zim had just ended a transmission to the Tallests when GIR crashed into him. "GIR!" He yelled angrily, and the defective SIR unit got off him.

GIR got off the alien and said, "There's a birdy at the window!"

"What…? Why are you telling me this, exactly?" Zim asked, annoyed. But, nonetheless, he took the elevator back up to the house level. When he got out, he saw that GIR was right. There was a large bird tapping at one of the windows. The first thing Zim thought was that GIR had actually remembered to keep the windows closed. That in itself amazed him.

He walked over to the window and looked at the bird. If he remembered correctly, this bird was an owl. But owls only came out at night, at least to Zim's understanding. So what was it doing here, in broad daylight? After a second look at the bird, he realized that an envelope was tied to its leg. This puzzled him, and his curiosity got the better of him, so he opened the window, letting the bird in.

It landed on the windowsill and held out the leg with the letter attached. Zim untied it, and the owl flew away. How strange… He closed the window and looked at the envelope. It felt heavier than normal paper, and looked a bit older, almost yellow. His name was written on the back in very neat script. Who would send a letter to him? And by owl, no less?

He tore open the envelope and pulled out the paper inside. It was very similar to the envelope, in that it was a heavier and older paper. The same fine script filled the page.

After reading the letter, which said it was 'Hogwarts School for Witchcraft and Wizardry', he was puzzled. He couldn't tell if this was a prank, or if it was real. After all, he'd seen magic on TV, but it had always been fake. There was no truth to it. Yet this letter seemed so official, and seriously, who would find an owl and make it fly to his house in the middle of the day just for a prank?

"GIR!" He yelled to the robot, who raced to his side. "We're going to London!"

The only problem was: he didn't know where London was. But, luckily, that's what his computer was for. After getting the location of the city, which was somewhere called 'England', across the ocean, Zim decided that the fastest and easiest way there would by the Voot Cruiser. The only real problem was that it was tiny, and if the letter was real, then he'd need to bring a lot of his stuff, because he'd be staying at that school for eight months.

Luckily, the Invader didn't have a change of clothes, so that wouldn't waste space. He brought his portable communicator, to still be able to report to the Tallests, all of his repair tools, just in case something happened to his PAK, and some other trinkets. GIR sat in the cockpit with him, with duct tape over his mouth so that he couldn't start singing the Doom Song on the way.

They reached England, and landed in a forest near their destination. He frowned. "I hate cities," he said, remembering the time that he'd been stupid enough to get lost in the city on purpose, making the mistake of trusting GIR to get them home. But he turned on the newly installed cloaking device for the Voot Cruiser and quickly donned his disguise. It wouldn't do to go into a human city without it.

Of course, with his skin still green, he got quite a few weird looks anyway. GIR, donning his dog suit, didn't help much. "Where am I supposed to go?" Zim growled under his breath, angry that the letter and list hadn't included where he'd get all of his supplies. All he had to go on was the return address that said London, and here he was, with no idea where to go from here.

Zim saw a very large man leading a boy into a building, and could just barely hear him saying something about 'Hogwarts school supplies', so he quickly followed so as not to lose them. Though, it'd be hard anyway, since the man was about twice the size of everyone else. The place went silent as soon as the black haired boy walked in, so Zim started to wonder if he was someone important. Neither he nor the man noticed him until they had gone out the back door.

"Who're—why is your skin green?" the boy asked, staring at him.

"It's a skin condition," he muttered. The boy didn't even want to ask about GIR, since the robot was currently chasing a random butterfly. He really didn't want to know.

Zim followed them through the doorway, but as soon as he was through, he darted away. He didn't need humans helping him in any way. They just happened to have been going the same way, and only the large man knew the way in. He didn't want them thinking otherwise.

He wandered for a while before realizing something very stupid. He didn't have anything to pay with. All he had on him was Irken moneys, and he knew they wouldn't do any good here on Earth. Great, now what was he supposed to do? He ran through options in his head.

Option 1: Steal what he needed. It wouldn't cost him a thing, and he could get everything that he needed. The only problem was, if he got caught, he was screwed.

Option 2: Find that boy again and try to con him to get money. Or pickpocket him. Whichever worked better. The problem with that was that that would require Zim asking a human for help.

Option 3: Just go home and forget the whole thing.

As tempted as he was to go with Option 3, his curiosity nagged him, begging to be told what this was all about. So, no matter what, he had to make it to Hogwarts, even just to satisfy that annoying part of his brain. And who knew? If they really did teach magic, maybe he could learn magic powerful enough to aid with his plans to conquer the Earth. The possibilities would be endless!

One sacrifice was okay for a bigger goal, he reasoned. So with that, he went to find the boy and the giant of a man.

Zim got lost many times, and half the time, he was chasing after GIR, who'd seen something shiny. After nearly an hour of searching, though, he finally found them. They had stopped for a bite to eat. He walked up to them and swallowed his pride for a moment. "Um, I have a little bit of a problem," he told them, using his best 'poor, lost kind' voice. "I have to get stuff for my first year, but I don't have any money…"

The other boy frowned. "Well, if you really need money, I can lend you some of mine, and just pay me back when you've got enough," he said, pulling out a heavy looking pouch of coins. Bingo!

Zim grabbed the pouch, and resisted the urge to just run away with it. He went to all the shops and retrieved his supplies. He was weighed down by all the stuff, even though GIR was carrying a lot of it, when he arrived at the last place he needed. He'd found someone random on the street to point him towards Olivander's, the only place in London where he could get a wand.

When he walked in, the bell on the door rang a bit, and after a moment, an old man came into view, walking to the desk. "Hello," he said, looking at Zim quizzically. "What can I do for you?"

"I need a wand," Zim said. "I'm starting school at Hogwarts this year." He was feeling really uncomfortable under the old man's stare.

"I see…" the man said, and went to the back to try and find a wand for the alien. After about six tries, Zim finally found his wand: sycamore with dragon heartstring. The old man looked at him again. "Maybe we'll see each other again, someday, alien boy."

Zim froze on his way out. No. there was no way this old man could see through his ingenious disguise! "I-I don't know what you're talking about…" he said, and quickly walked out, still feeling the old man's stare bearing through the back of his head.

At the end of his shopping, Zim had ended up spending literally all of the money the boy had lent him. There was absolutely nothing left in the pouch.

When Zim and GIR finally made it back to the Voot Cruiser, Zim realized a serious problem: How was all of this going to fit into the Voot Cruiser, with him still being able to fly it? He began trying to pack everything in, and finally, after what seemed like hours of work, everything managed to fit comfortably.

Now, yet another question arose: where was he supposed to stay until he had to get on the train to school? He banged his head on the windshield of the Voot Cruiser, grumbling.

He managed to live in his vehicle for the last few weeks until he had to go. He and GIR made sure everything was packed enough to be able to carry and headed back to the city to find the train station.

They were forced to stop and ask for directions, but they arrived at the station with time to spare. It was a good thing, too, because he had no idea how to reach 'Platform 9 ¾'. He looked around hopelessly until he saw a family going towards the wall between platforms 9 and 10. The boy from London was with them. They ran straight through the wall, and Zim watched, a bit surprised. He quickly got over it, though, and tried to do the same. He expected to just hit the wall, so one of the legs from his PAK reflexively popped out to brace against the wall to stop his from breaking something, but instead, he plowed right through. The leg quickly retreated, unnoticed.

Zim's eyes fell on the huge train in front of him, astounded at its sheer size. Yes, the Massive was much, much larger, but for a human land transportation unit, it was huge! He and GIR dragged his bags on the train and picked an empty seat in the back. He stared out the window while GIR started singing the Doom Song for no apparent reason. Luckily, Zim had zoned out too much to listen, or he would have strangled the poor robot.

His mind was wandering to the year ahead. What kind of stuff could he learn? Would he be able to use it to silence Dib once and for all, and conquer the Earth for the Irken Empire?