Alright, time to tell my story!
It all started with Goodra. I asked the community of Pokébeach to give me some partners. @Yog suggested Sylveon GX/Goodra. I tried. It didn't go well. Other Goodra variants came soon to follow. None of them really worked.
Then I thought: alright, let's TRY Goomy. My first idea was Quad Goomy, but before building I decided against it because I have no clue how a mill deck works.
Then, I tried (out of my love of Ultra Prism) Goomy with Honchkrow. Idea was to discard cards from the opponent's hand with Rip and Run, and then strain Energy by switching into a Goomy. I ran into the same mill deck problem.
At my local league, I shared my Goomy/Honchkrow idea. Some genius said that I could play Kartana GX in the deck for its Ability for some more Special Energy discard. Then I saw it: Kartana's attack shuffles it into the deck. Attack, shuffle, bring up Goomy. Like Accelgor/Wobbuffet in Expanded.
It all started with Goodra. I asked the community of Pokébeach to give me some partners. @Yog suggested Sylveon GX/Goodra. I tried. It didn't go well. Other Goodra variants came soon to follow. None of them really worked.