You will need to register for the event in order to play
If you have to put Klang into play, I would recommend using Guard Press every turn because it is the only move that can do damage to your opponent's active Pokemon, but if you don't have three energy cards on Klang you'll have to use Confuse and hope that the defending Pokemon attacks itself instead of Klang the next turn
This can be hugely troublesome for your opponent, who might be shielding vulnerable, damaged Pokmon by keeping them Benched
The card could be seriously warped or has seriously layer peeling
The market already experienced a significant correction between 2021 and 2023, with some cards declining 30 to 50%
In conclusion, playing the Edison format is a very rewarding experience and you should give it a try in case you love retro formats and think that Goat format is a bit too slow for you.