Dib sat silently in the pilot's seat in Tak's (former) ship, observing the surrounding galaxies and whatever planets he could spot in the infinite void that was space. He hadn't planned on any big space adventures this week, but a sudden "Zim alarm" alerted him that Zim was going off planet. It wasn't rare for Zim to leave Earth, but it was uncommon. Zim tended to only go into space for weird plots that almost always failed and it was Dib's job to make sure of that. It felt like they had been flying for ages. "Ship?" Dib spoke aloud for the first time since they'd left Earth.
"I thought our agreement this time was you wouldn't speak unless absolutely necessary, what do you want?"
"Where are we even going? We've been flying for hours and we still haven't found a single trace of Zim's whereabouts." The ship let out an audible sigh.
"Human, you'll find out when we get there. We're practically there anyway so hush up and let me fly in peace." Dib was going to retort something back, but thought against it. After all, he knew better than to cross the Irken machine, considering it could kill him in various ways. Dreadful, horrible ways that only Irkens themselves could think of. They continued flying for a short while with Dib drifting in and out of consciousness. A sudden jolt awoke him, as a bright red "ERROR!" greeted him on the frontal screen of the ship. Dib looked around and noticed a similar message popping up on all the other screens around the cabin. "Ship! What's going on? Did we hit something?!"
"Negative, we have not hit something." Dib looked frantic as he fiddled with the console, he couldn't figure out the problem.
"Then what's wrong?!!!" The ship groaned.
"You'll find out in a moment." Dib flashed the ship an annoyed look.
"Stupid ship!" he growled, gripping a button on the console. A screen behind him snapped off its cable, a large crackling sound emitting from it. The planetary hologram on the front of the console went static, and he felt the hull of the ship tilt forward as it began a free fall.
"Crash imminent." The ship stated matter-of-factly, leaving Dib to panic.
"Crash?! Crash where?!" He hadn't noticed any planet around them as they'd been flying, at least none of the ship's interest. It hadn't alerted him of any planet incoming either to give him a chance to avoid it. He could feel the ship being pulled down into the planet's atmosphere.
"Planet Irk."
"I-Irk?" Dib stared out ahead of him, at the planet that was seemingly coming up to meet him. "Zim's home planet." The ship's warning alarm blared louder than before.
"PLANET INCOMING" The moment those words hit Dib's ears, he knew that there was no way to stop this. He was going to almost definitely crash and die on Zim's home planet and none of his family members would even notice he was gone. Fear flashed through him as the ship entered Irk's atmosphere. Dib could only watch as flames engulfed the ship, causing him to slightly tremble in fear. He braced himself for the impact. As soon as the ship did make contact with the planet's surface, Dib was knocked unconscious.

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Corrupt Dib - An Invader ZIM AU fanfic
FanfictionDib accidentally crashes Tak's ship on Zim's home planet, Irk. Dire consequences come of this Basically, an AU where Dib crash lands on Irk and gets a PAK implanted into him which slowly corrupts him and his DNA and turns him into an Irken.