"Crazy Sunshine" and "Ride on shooting star" can both be found on the FLCL No.3 soundtrack CD. You can buy the CD from some sellers on Amazon.com who will send it to you from Japan!
These headphones looks pretty close to what Hidomi wears too.
The original designer of these headphones actually made a big deal about it.
I'm experimenting with using GraphicsGale at the minute! Using the scene from the episode as a reference for colours and motion, so the process is more like lo-fi rotoscoping. By hand on a tiny scale basically, the advantage of the pixel style is you can work with a tiny canvas since it's going to get pixellated anyway which cuts down the work a little! As does dropping the detail on Mamimi's clothes and making that area solid black. I also cheated a little bit by reversing the forward animation to make the (attempted) loop, so the actual animaton is only about 3 seconds long.
I also did some work in post on it too, I was in AfterEffects anyway to reverse the image sequence and check if it looped ok, so I put a little analogue texture on it and pushed the RGB channels slightly out of alignment to get that subtle Chromatic Abberation effect.
Ive seen this site used a lot for stolen designs. I even found it on amazon for $6 https://www.amazon.com/Banosin-Mens-Black-FLCL-T-Shirt/dp/B07C2NGKKG/ref=sr_1_7?keywords=flcl+shirt&qid=1553904519&s=gateway&sr=8-7
Here is a link to it on Amazon, but it says it is unavailable. I also saw it on Ebay for like 80 bucks, which is a lot for a dvd set.
According to this Cruncyroll article it's titled "Become the King" and follows a photographer in the rock scene.
Check this site out. It has a lot of templates for fight sticks including yours. Then you can use Photoshop or Gimp which is a free alternative that I've used for years.
I just noticed your username, it's funny, when I was growing up watching the show I thought it was Artomisk, so when I made my second email (the first was any1234556789) I named it Artomisk. Years later, rewatching the series with subs I would realize that it was Atomsk and feel silly, but in the end I still like mine better.
Here's a link, Kari Wahlgren is nominated for Haruko for best English VA, and Alternative is nominated for best end sequence. https://www.crunchyroll.com/animeawards/index.html?utm_source=community_cr&utm_medium=twitter&utm_campaign=anime_awards_2019&referrer=community_cr_twitter_anime_awards_2019
Here's a link, Kari Wahlgren is nominated for Haruko for best English VA, and Alternative is nominated for best end sequence. https://www.crunchyroll.com/animeawards/index.html?utm_source=community_cr&utm_medium=twitter&utm_campaign=anime_awards_2019&referrer=community_cr_twitter_anime_awards_2019
What kind of fight stick do you have? I was doing the same thing not too long ago and found some templates for sticks. I still have the raw templates saved for this one. I gutted the stock parts and replaced them all with Sanwas
I got this one years ago and I love it.. the art on the CD is great and it has most of my favorite songs off the soundtrack. This may differ for you but check it out!
http://www.amazon.com/FLCL-Original-Soundtrack-V-3-Pillows/dp/B0008JH6DW
Track list: 1. Sad Sad Kiddie 2. Sleepy Head 3. I Think I Can 4. Blues Drive Monster 5. Carnival 6. Come Down 7. Crazy Sunshine 8. Stalker 9. Nightmare 10. Funny Bunny 11. Beautiful Morning With You 12. Advice 13. Runners High 14. Hybrid Rainbow 15. Little Busters 16. Last Dinosaur 17. Ride On Shooting Star