This is a guide of how to deal with Route 3 Moon Manip IGT´s.

Frame 20:
https://www.extratricky.com/pokeworld/rb/60#21,9 (Geodude) Pick up Mega Punch, the Moon stone and use PoY Manip: https://pastebin.com/7kcZu3g4

Frame 21:
https://www.extratricky.com/pokeworld/rb/59#7,3 (Zubat) Like Frame 20

Frame 35: 
https://www.extratricky.com/pokeworld/rb/61#35,14 (Zubat) Just walk to Rocket and go for Backup Paras Post Fossils

Frame 36:
Moon Center NPC walks right, use this Route through Mt. Moon:
https://imgur.com/a/Z6mTveD
(New Version: https://imgur.com/a/UrOD78p)

Frame 37:
Moon Center NPC faces left, use this Route through Mt. Moon:
https://imgur.com/a/9CogLt8
(New Version: https://imgur.com/a/UrOD78p)

Credit to Stringflow and Hwangbro