While the system works well enough for most transactions, it still suffers from the inherent weaknesses of the trust based model
The best Pokemon to use at this club are unsurprisingly, Fire Pokemon
Helix Pinnacle's triggered ability has an "intervening 'if' clause." That means (1) the ability won't trigger at all unless Helix Pinnacle already has 100 or more tower counters on it as your upkeep begins, and (2) the ability will do nothing if Helix Pinnacle has lost enough counters such that it has fewer than 100 counters on it when the ability resolves
So with that in mind, I would not recommend using Hydreigon from this set with its pre-evolution cards from this set, but I would absolutely recommend pairing this card with pre-evolution cards from previous sets
You may be wondering whether this skirts around that pesky Indestructible - but the answer is no
Plus, new players who complete the how to play tutorial are greeted with a whole stack of reward packs to crack open from the last couple of years' worth of sets (plus a selection of variant land cards to use)