Base - WigglyPeek

https://jklaczpokemon.com/base-fossil-decks-2/

"This deck’s first turns (usually Smokescreen or Lullaby) might not appear too threatening to your opponent, but while you’re doing this, Mankey helps you prepare the perfect turn by identifying your best Prize cards. Once you’ve spotted them, you’ll rush your opponent with Professor Oak in order to fill your bench and deliver a KO with Wigglytuff’s Do the Wave! Just before that KO is delivered, though, you’ll want

https://jklaczpokemon.com/base-fossil-decks-2/

"This deck’s first turns (usually Smokescreen or Lullaby) might not appear too threatening to your opponent, but while you’re doing this, Mankey helps you prepare the perfect turn by identifying your best Prize cards. Once you’ve spotted them, you’ll rush your opponent with Professor Oak in order to fill your bench and deliver a KO with Wigglytuff’s Do the Wave! Just before that KO is delivered, though, you’ll want to play Lass to safeguard yourself from Energy Removal & Super Energy Removal. This would usually hit you just as hard as your opponent, but with knowledge of where your best Prize cards are, you can select the perfect Prize to keep the pressure on.

Tip: Once you have your opponent in a pickle, use Peek to keep an eye on the top card of their deck. If you spot a card that spells trouble for you (like Professor Oak), switch into Moltres and discard that card with Wildfire."