Dang! Now that would be nice to see n this game.
Then let's discuss that instead. Here are the rules from the Pokémon Trading Card Game Tournament Rules and Formats document, or rather the last revision of it that still contained them (November 2, 2017):
The 30-card format allows players to build decks consisting of half as many cards as a standard deck. This tends to reduce the amount of time needed to play a match, allowing players to get in more games in a shorter time frame than a standard game.
In a 30-Card—Constructed event, players arrive at the tournament with a 30-card deck. The cards used to build the deck come from each player’s personal collection. Decks may not contain more than 2 copies of a single card, as defined by the card’s English title, with the exception of cards that are limited to one per deck by card text and the standard exception for basic Energy cards. Matches are played for 3 Prize cards.
In a 30-Card—Limited event, players construct their decks using only cards provided by the Organizer at the event. Each player’s deck must contain exactly 30 cards at all times. Decks may contain more than 2 copies of a single card, as defined by the card’s English title, with the exception of cards that are limited to one per deck by card text. An Organizer must announce whether they are providing players with basic Energy cards before the date of the event as well as at the event before it begins. Matches are played for 3 Prize cards.
Aside from the deck construction changes listed above, the standard Limited rules detailed in Section 11.2 apply to 30-Card—Limited events.
I forgot that 30-Card also only uses 3 Prize cards. A bit awkward for certain cards, but overall I'm thinking that is another valuable feature. Pokémon-EX/GX are still legal but one being KO'd is worth over half of your Prizes!
If you do not have Private Messages enabled, it really limits you in discussing the Pokémon TCG.