My FAQ if you desire: https://pastebin.com/rMgiYCy2

Notes Link: https://docs.google.com/document/d/1-1HFAproSnZpKXm0XFKV7tLxP1R156hymb1wBflVBoI/edit?usp=sharing

This isn't a beginner route, if you aren't well versed with Gen 4 RNG manip I would highly recommend starting with the Single Tentacruel route. With that said, I never ran the Single Tentacruel route at all and I did just fine, choice is up to you.