The player must answer truthfully and abide by that answer until the end of the turn
No, you cannot under-crew a vehicle, the crew cost is like a minimum in order for creatures to be spent crewing a vehicle
In this brew you can drop Yoshi turn 1, this turn 4 and copy the Dog, and then play around 10 or so other Clones for your Dog and then you run a bunch of legendaries and around 10 or so blinks to blink them in and out and pump up the entire team of Yoshis
The set is the first of the new Mega Evolution era of Pokmon TCG, following the end of the Scarlet and Violet era.
It doesnt do much in Commander (kind of nothing, really), but the ability to tutor multiple copies of the same artifact to the battlefield is intriguing
On top of this it is reasonably narrow and will only be put in decks that are really desperate to deal with something or lack any other answers of this kind