You have a chance to find some nice cards in these decks.
The Start Deck 100 has been released in Japan on Friday December 17, 2021. Some decks contain higher rarity cards.
Marnie's Pride and Barry get a Full Art Supporter version. Pikachu V, Granbull V and Zamazenta V get a Full Art version. And lastly Galarian Articuno V, Galarian Zapdos V and Galarian Moltres V get a gold card.
Mirrorfoil card decks are in certain decks. Also there allegedly is a 'God Deck' available as 101/100. Currently unknown how frequent these appear.
'God Deck' 101/100
415/414 Pikachu V
416/414 Granbull V
417/414 Zamazenta V
419/414 Marnie's Pride
420/414 Galarian Articuno V
421/414 Galarian Zapdos V
422/414 Galarian Moltres V
(Some of these images come from various Japanese marketplaces)
Someone pulling Marnie's Pride SR from deck 096/100.