I like to think that Keith kept sneaking into the Garrison to collect info, steal food,supplies etc and became a sort of a myth after some students spotted him during one of these trips. So the new Garrison meme is blaming Keith for everything
“ have you seen my maths book? I can’t find it.”.
“maybe Kogane took it”
“I failed my test, I think Kogane cursed me :/”
“The cafeteria ran out of tater tots before I could get any! Screw you Kogane!”
Keith Kogane, the Garrison cryptid