Whilst making sure you have a strong core set of Pokmon in your deck these should be complemented with Trainer Cards that are split into categories such as Supporter and Item cards
Lots of love for the gen 3 starters but Treecko appropriately recognized as a bit of an oddball
Branded Beast X TRAP Continuous Once per turn, during the Main Phase, if you control a "Bystial" monster: You can Tribute 1 Dragon monster, then target 1 card your opponent controls
Technically, Shiny Pokmon appear to be a different style of alternate art card themselves, but I'm interested in seeing just how rare these new types of cards are in the game
Pokmon stamp as seen on the below images, and some have an additional full-holo variant (ones ticked with Holo? on the spreadsheet)
40 life formats see most folks just taking 2 each of their upkeeps, but that can drop people more quickly than you realize