Eternatus VMAX Toolbox Combo

Eternatus VMAX is a Pokémon with a unique Ability: if you only have Dark-type Pokémon in play, you have eight spots on your Bench, but you can only play Dark-type Pokémon. This means the deck has to commit to a mono-type build, for a payoff that other decks can simply achieve with the Sky Field stadium, and that is still countered by Sudowoodo. Eternatus VMAX's stats, while respectable, are also nothing gamebreaking for a 3-Prize Pokémon, so the deck is pretty weak by the standards of Expanded.