Just because there are a few posts that seem confused, let us run through how I believe Nugget works, based on the current translation:
For reference sake, the translation for Nugget as of this post:
Play this card when you draw it from your deck at the start of your turn (before putting it into your hand).
Draw 3 cards.
Let's cover how Nugget
most likely works:
- Your turn begins.
- You must draw a card at the start of your turn, so you do that.*
- If it is Nugget, you choose** whether to immediately activate its effect, or add it to your hand.
- If you activate that freshly drawn Nugget, you draw three cards.
- If you choose not to Activate it, then add it to your hand.***
What if you draw a copy of Nugget when using the effect of Nugget?
The second (or third or fourth) copy of Nugget was
not drawn as part of your draw for the turn, but as part of the effect of that first copy of Nugget, so the other copies will
not trigger. Pokémon lacks a "Draw Phase" the way games like Magic: The Gathering, Yu-Gi-Oh, and many others have; while you have to draw a card at the start of your turn* it is a mandatory action. I know of no effects that increase how many cards you draw as part of your manual draw for the turn.
Combos for Nugget:
Anything that lets you control the top card of your deck. Such combos
only work if neither you nor your opponent do anything that would force you to draw from the top of your deck, shuffle your deck, or add another card onto the top of your deck. Here are some cards that can be used to put a Nugget on top of your deck:
- Florges (Forbidden Light 86/131
- Magcargo (SM - Celestial Storm 24/168), via its "Smooth Over" Ability
- Mallow, via her only effect (Expanded only)
- Oranguru (Sword & Shield 148/202), via its "Primate Wisdom" Ability
- Recycle, via its only effect (Expanded only)
The best candidate here is probably Oranguru; while some decks already using it are doing so to place a
different card on top of your deck, some are using it just because its good draw (at least, for just having to run a Basic Bench-sitter). As long as you don't need to use it to top-deck something else
every turn, you can still use Oranguru's Primate Wisdom to swap a card from your hand with one from the top of your deck, with that first card being a copy of Nugget you didn't draw at the right time.
Remember not to use any effects that force you to mess with your own deck afterward, unless they're worth abandoning the Oranguru/Nugget combo!
Common Counters for Nugget:
Definite concerns, but if you're seriously running Nugget, that just means you try again later.
Reasons to not run Nugget:
- Deck doesn't contain enough cards that let you artificially top-deck it.
- Lack of deck space
- Track record of similar cards
That last one requires a bit of explaining, but not too much. First Ticket. Greedy Dice. Jirachi {*}. None of these cards have effects that trigger when you draw them from your deck, but they have similar odd timing. Some, like First Ticket, were expected to see a decent amount of play, but like the other two, pretty much nothing.
*If you can't draw because of no cards left, you lose. There may also be some card effects that prevent you drawing at the start of your turn.
**The wording from the translation actually makes it sound like you have to use Nugget if you draw it, but there's no way to regularly enforce such a thing, so I assume it will be optional.
***Once Nugget is added to your hand, even if you just drew it, you usually can't prove it, so don't do this unintentionally.