We now have synchro monsters, XYZ monsters, pendulum monsters and link monsters that can all utilize the extra deck and all of a sudden, having a good extra deck makes the difference between winning and losing
Fire-Forged Friends: Yuma and Shark seem to finally be friends after their Tag-Team Duel, due to Yuma's constant protection of his life points and defense of Shark's own personal failings in front of their opponents
The horizontal layout, gold borders and textured foil set them apart from any other Pokemon card design before or since, which is why this short-lived mechanic remains a favourite among long-time TCG collectors

Visual Deck List Example deck List Pokmon - 14 4 Gholdengo ex PAR 139 4 Gimmighoul SSP 97 2 Togekiss SSP 72 2 Togepi OBF 83 1 Fezandipiti ex SFA 38 1 Munkidori TWM 95 Trainer Cards - 35 4 Arven OBF 186 2 Boss's Orders PAL 172 2 Ciphermaniac's Codebreaking PRE 104 2 Morty's Conviction TEF 155 1 Iono PAF 80 4 Buddy-Buddy Poffin PRE 101 4 Superior Energy Retrieval PAL 189 3 Nest Ball PAF 84 3 Ultra Ball PAF 91 2 Night Stretcher SFA 61 2 Rare Candy PAF 89 1 Counter Catcher PAR 160 1 Earthen Vessel PRE 106 1 Energy Search Pro SSP 176 1 Technical Machine: Evolution PAR 178 2 Levincia JTG 150 Energy - 11 3 Basic Metal Energy SVE 8 2 Basic Lightning Energy SVE 4 1 Basic Darkness Energy SVE 7 1 Basic Fighting Energy SVE 6 1 Basic Fire Energy SVE 2 1 Basic Grass Energy SVE 1 1 Basic Psychic Energy SVE 5 1 Basic Water Energy SVE 3 Testing Streams Archaludon ex BASIC STRATEGY Coming soon
Oakhollow Village and Rockface Village seem useful
So often wed have a Bristly Bill, Spine Sower out with a bunch of other enablers, and our opponent would just chump block it, then win