Pokemon Stadium may not be legal at all events unless it is the Omega version.
The stages that I noticed you left out were Smashville, Town & City, and Lylat. Those are legal at many tournies you may attend off campus since they are seen as the norm.
I'd suggest practicing on Lylat since a good amount of players complain about the stage for various reasons like: the platforms, stage tilting, falling through the stage, and how if you are un-prepared or in a bad position offstage, your attemptnto recover will fail due to the tilting and the underside of the stage usually causing recoveries to not travel to ledge or instead direct them the wrong way.
Gonna link a lot of videos if you would like to check them out.
Art of series by Izaw: It's not the character version but one instead for Smash 4 in general. This link takes you to a playlist. I would like you to watch the first 5 videos in the list. The 5th is agreed by different players on discord to help them with the neutral game.
Art of Smash: https://www.youtube.com/playlist?list=PL4SzCzeORbSTvQ0WWhM-CTNaY4oLiy5k7
Wavebounce/B-reverse: An advanced technique available to the entire roster
https://youtu.be/Vw1elkJwtDo
Perfect Pivot: Two alternate methods that can help make the tech easier for you
https://youtu.be/nY2t9k3C-wk
https://youtu.be/SxSZbjT4uUM
Neutral Guide by Deku Tree:
https://youtu.be/_QQUi67MLE8
www.shulk101.com : Your one-stop shop for everything Shulk related, that way you can avoid misinformation and be ready for anything he does. Check all the tabs, there is information everywhere on the site.
This video can help you in the ROB match-up
https://youtu.be/tgm-TaFcDD4
Beefy Smash Doods:
This playlist contains tons of useful Smash 4 info about tech, characters, etc. Not all of the videos in the playlist are about improving at Smash 4, and a few are dedicated to doubles.
I'll point out the videos I think you should watch, so you can keep with Smash 4 common knowledge. I'll be using the titles in the thumbnail pictures to name them in the list below.
Competitive Smash 4 Guides & Tutorials: http://www.youtube.com/playlist?list=PL6BPj6LYE4vpCUaKKLK3-fDxWNOtws2eA
- Why Spam is Bad!
- A-landing tutorial
- Anti-ledge trump guide
- How to mash fast
- Super and heavy armor
- Impossible to tech
- Mystery solved (this video is near the bottom of the playlist and goes in hand with #6)
- How to beat bayonetta
- Momentum cancel
- 2 frame punish
- Cloud mains hate this
- How to improve
- 1 second rule
- In depth footstools
- Trumped nope
- How good are shield grabs
- Edgecanceling
- How to escape shieldlocks
- Combo counter is broken
- Untechable again
- Aerial input lag
- Input buffering in depth
- Instant tether trumping (the stages listed in the video are no longer available since miiverse has been shut down
- Grounded spike cancel
- Stage spike option select
- Burrows are weird
- Rapid jab edge cance
- Fool your opponentl
- Hitting through platforms
- All reflectors can break (these videos are not in the playlist so here are the links) https://youtu.be/gorRcgaxQ-4
- Rco lag in depth https://youtu.be/cwSsHBNFC94
- Its a di trap https://youtu.be/wKGTh0Q5Y9Y
- Footstool out of shield https://youtu.be/OS46kkk6SBg
- Grab release in depth https://youtu.be/UC3PF-LxS1U
That's a ton of videos. They made a lot over Smash 4's lifetime.
Be sure to take notes on which information you want to remember, because you may forgot some, I know I have.
Recently BFD, has been making videos showcasing character specific tech among other things like metal blade combos for the majority of the cast, to help raise awareness of character tech, that may be exclusive or a character discord or missed on smash reddit.
If you would like to be aware of those, you should visit the character servers, ask them for their obscure or character techniques and hopefully they should help you. If not, try again later.
Here's some more information.
There is this website which features almost all of the frame data in the game. Contains a lot of useful and miniscule informaton along with Smash 4 memes sprinkled about waiting to be found.
He also has a mobile app which features more memes and is mainly used for looking up character frame data on the go.
Disclaimer: Not all information on the website is in the app.
http://kuroganehammer.com/Smash4
By the way, what is your discord username and discord number tag? I would like to talk to ya there. Also discord has a mobile app too.