They cannot be destroyed by battle (being immaterial and all) but are banished the instant their favorite Field Spell leaves the field
The surprise factor is a massive plus here, and once you lose that youll have a bit of an uphill war to wage
My neighbour has two vans and a normal transit, the other is a catering van full of cooking oil which is parked around the back of our houses but next to my car which is parked on my own land
Defeat him, then take part in the final tournament
Related How the Scarlet and Violet era Megas do it better A powerful card like a Mega ex cant be too easy to play, but the modern equivalent of this mechanic seems much less punishing than its predecessor
As you can see from just these few examples, what the Tinker Time deck really wants to do is create as many tokens as possible of various forms, use them for their abilities (don't be precious about your treasure tokens), and overwhelm your opponents with a barrage of attacks