This is a universal adapter a should work.
Use a universal adapter.
Yes you can use a universal Rf Adapter with your gamecube. One particular brand is called Mad Catz Universal RF Adapter.
universal adapter
They do make universal USB serial adapters. They are very affordable.
You can buy a universal adapter from online stores such as Amazon, Newegg, and Tigerdirect. You can also go to your local electronics store (Target, Bestbuy, or Walmart) and buy it there.
Vnsport Universal Travel Adapter 45W PD Support fast charging and QC3.0 USB Type-C for USA EU UK AU Plug all in one 3 USB universal adapter travel charger 200+ Countries
A universal AC adapter can be purchased from The Source, Future Shop, Best Buy, Staples, Walmart, Target, KMart, Sears, Grand & Toy, Amazon and Office Works.
You can connect a wi-fi adapter to a ps4 using Linksys PS4 Wireless-AC universal media connector.
According to google if you have an automatic universal adapter, that adapter will automaticly find and adapt itself , the polarity ,voltage,amper , so that means an adapter can adapt polarities as well as voltage and current. A manual universal adapter on the other hand you have to adapt the polarity manually on the adapter itself , by checking what the device you wanna power has positive or negative, most electronic devices presently use positive . Check and see what voltage , amper and polarity a device needs. Positive : +--o)--Minus , Negative : Minus--o)--+ Or Positive: Minus--(o---+ , Negative : +---(o---Minus And adjust manually to what is required.
I assume when you say, "Universal TV", you are referring to channels outside of your country. To do this you will need to contact your TV cable provider and they can hookup a universal adapter that will allow you to view channels outside of the country.
There are universal spacer adapters for that