Oak was created on Irk, but then when Oak was a small kid, A Vort scientist lied to the Tallest saying that if Oak lived on Irk he'd be taller than them, and would rule them. The Tallest didnt lke this, and sent Oak off to Vort to become a Vortian instead of a Irken. Oak grew up on Vort as child, then he started learning all about Vort scientists. He started to study them, and then became a Vortian scientist as well. Altough the Vortians wouldnt allow an Irken to become a scientist, so Oak was never offcially a scientist., but then one day, when the Vortian scients were giving new plans to Tallest, Oak stal all of the Cortian supplies. Soon the supplies were replaced, but Oak still kept the tools. Oak knew almost everything about science, such as measuring, to surgery. Oak came to his brother, Lor and told him these things. All though Lor didnt seem to care, Lor told Oak about Jet, and how he was "assigned" to protect Jet. The Tallest found out of him being a scientist and swore to kill Oak. Now oak stays with Jet as his scientist.
zim heads over 2 invader fang's base and he told invader fang that he needs 2 invade earth so fand told zim yes i will invader earth and so they did but dib keeps on desturbing them and so zim and fang called the martians and the other irkens over and the whole fleet conquered earth til one dag zim saw dib capturing the tallest they where saying help we have been captured door an earth specimen named dib and so zim and fang teamed up with invader bracy invader tootoo and invader swellow and they all rescue them from dib invader carrot and invader wong and invader kelly and invader ashpod joined in and they all save the almighty tallest and went back 2 girsmurf22 and titanicdragon and pastachick they also was happy 2 c invader zim return and we all had a party on zim's victory of conquering earth and so the legends continues in of on planet irk and they have a celebration on it and the tallest premoted them all 2 almighty tallest also