What Actions can I do with my Things?

Solution 1:

Thing cards, while most of them do damage, also have extra effects, especially in boss battles. For example, the Balloon, which normally takes out enemies by floating them away, can be used to pull one of the bosses out of the water so that you can attack them. The Instant Camera helps you avoid another's Instakill combination, as the copy would be the one snagged by the neck. The Washing Machine is especially helpful in the final dungeon, as it would wash away the black paint one boss fires off as a last resort kind of thing. And then there's the Gro... I mean, the Disco Ball, which doesn't do damage, but causes your enemies to dance, making them skip a turn.

A few can blind your enemies, like the Salt and Pepper, while the Compass lets you flee from a fight (excluding boss fights) as two more examples.

There is also a way to do more by hitting A at the right time(s) during a Thing animation. For example, with the Lucky Cat, you hit A whenever it slams into the ground.