Pokemon Build and Battle Box
The Build and Battle Box contains 4 boosters and an evolution pack that contains the prerelease promo and 20 other cards that could easily be made into a deck.
Here Pokémon's description for the new Rebel Clash
Rock out with new Pokémon! Crank it loud and blast the beat—you’ll find the rebellion, chaos, and punk attitude galore in the Pokémon TCG: Sword & Shield—Rebel Clash expansion, loaded with Pokémon V including Toxtricity V, Dubwool V, Boltund V, Sandaconda V, and more! You’ll also find a handful of Pokémon VMAX, including the final Evolutions of all three first partners, plus Copperajah VMAX and Dragapult VMAX. Take to the stage and the streets with the Sword & Shield—Rebel Clash expansion!
The set will include over 190 cards, dozens of recently discovered Pokémon form the Galar region, 15 powerful Pokémon V and 7 enormous Pokémon VMAX, more than 15 Trainer cards, and 4 new Special Energy cards.