The back card is a nice piece of equipment for Humans
If a monster is Normal or Special Summoned from outside of the field, that monster is not considered to have been on the field at the time its Summon was negated

Vaporeon VMAX #30Ultra Rare $10.98 Eldegoss #16Holo Rare $0.26 Tentacool #26Common $0.11 Chinchou #52Common $0.09 Trevenant V #13Ultra Rare $0.72 Skiploom #3Uncommon $0.11 Tentacruel #27Uncommon $0.09 Sharpedo #36Rare $0.19 Psyduck #24Common $0.22 Wishiwashi #46Rare $0.15 Cutiefly #92Common $0.23 Cutiefly #95Common $0.23 Cutiefly #145Common $0.36 Cutiefly #34Common $0.14 Cutiefly #34Common $1.00 Cutiefly #38Common Cutiefly #41Common $3.16 Cutiefly - 033/071 #33Common $0.09 Cutiefly - 075/162 #75Common $0.11 Cutiefly - 078/071 #78Art Rare $2.92 Sun & Moon Booster Box $945.95 Sun & Moon Base Set 3 Pack Blister [Togedemaru] Sun & Moon Base Set 3 Pack Blister [Litten] $50.00 Sun & Moon Elite Trainer Box [Solgaleo] $246.10 Sun & Moon Elite Trainer Box [Lunala] $250.03 Sun & Moon Base Set Theme Deck - "Forest Shadow" [Decidueye] $16.39 Sun & Moon Base Set Theme Deck - "Roaring Heat" [Incineroar] $23.44 Sun & Moon Base Set Theme Deck - "Bright Tide" [Primarina] $18.70

With Paldea trainers and Pokemon also coming to the set, Scarlet and Violet are getting a boost of representation in the game as well
Under good light, check for edge and corner whitening, surface scratches, off-centering, and creases
Whether you play casually or participate in Magic, Pokmon, or Lorcana tournaments, knowing the different types of sleeves and sleeving systems will help you better protect your cards and avoid making the wrong purchase