A card with those stats would rarely be good enough on its own to see play in Standard, but in Standard environments where attacking and blocking are important, it wouldnt be that far off and would quickly become good enough with additional relevant text and the correct home
Everything else is either 270 or below except Charizard (damages itself) and O!Palkia (weak to Regieleki so dies with a Belt to either this new one, or the EVS one)
SE Secret Rare Assault Wyvern X LIGHT Level 4 [ DragonEffect ] ATK 1800 DEF 1000 When this card destroys an opponent's monster by battle: You can Tribute this card
Perhaps thats the point
Emet-Selch, Unsundered does make for a good Commander, its true, but it also slots really nicely into Dimir and Sultai graveyard focused builds
Likely, the Pokmon Company is hoping to see a similar level of success as these games, and present a meaningful competitor as the Pokmon IP is likely stronger than at least Yu-Gi-Oh