In the case of Vanellope, she reduces the Strength of all opposing characters by 1, for one turn, every time you play another Princess character
The Emerald/Steel deck, for instance, focuses on keeping your opponent's characters damaged throughout the game and capitalizing on that board state
Winning with it is not easy compared to other starters, so be warned
Stitch, Carefree Surfer is one of several Stitch cards in The First Chapter, but has become one of the most valuable Lorcana cards to date thanks to its Enchanted Rare variant that features a full-art variant of Stitch reaching for his sandwich as its snatched away by a pesky fish
Contact your local game store and get ready to level up your Standard skills
However, for those who do choose to use these in a deck, it can be quite the flex and a way to mess with an opponents mind