AFD Scavengers Odyssey - 10 Years of Scavengers

1. What was the theme of the official Scavengers Hunt on July 5, 2009?
2. https://pastebin.com/ZGNMmiy9
3. AOPZWVRLTVUOHZHUOWZAHAVMMVYAFZPEHUHAAHJRZAHAVMLPNOAFZLCLUHKLMLUZLZAHAVMZPEAFHZWLJPHSHAAHJRZAHAVMAOPYAFHZWLJPHSKLMLUZLZAHAVMMVYAFHUKHZWLLKZAHAVMMPMAFZLCLUPAPZDLHRAVPJLKYHNVUHUKMHPYFHUKYLZPZAHUAAVMPYLDHALYNYHZZHUKLSLJAYPJPAZSLCLSBWTVCLZHYLZJYHAJOSLLYHZZBYHUJLKYHNVUYHNLKBHSJOVWZJHYFMHJLZSHZOMHSZLZDPWLKYHNVUJSHDKYHNVUKHUJLAHBUAKYHNVUWBSZLZDVYKZKHUJLNBPSSVAPULVBAYHNLHUKNPNHPTWHJA
4. Solve the anagram AAEEEEEEEEGGHHILMNNNNOOOOOQRRSSTTTTTTTUWX!
5. Red, Blue, Green, Olive, Gray, Indigo
6. Pokemon Sequence! Lombre, Lickilicky, ?
7. Q
8. https://i.imgur.com/FPxgB59.png
9. Foul Play, Dig, Tri Attack, Scald, Scald, Dragon Tail, Toxic, Fly, Fly, Foul Play, Fly, Scald, Scald, Fly, Toxic, Tri Attack, X-Scissor, Seismic Toss, ...
10. https://i.imgur.com/WAsanGb.png
11. (This question relies on the previous 10 answers.) When and why was this hunt written?