i'm no expert by any means, but this is the deck i'm running online that has a 60ish percent win rate, i'm sure it can be improved.
****** Pokémon Trading Card Game Deck List ******
##Pokémon - 15
* 1 Ditto {*} LOT 154
* 4 Swablu DRM 57
* 1 Latios {*} CES 108
* 1 White Kyurem-GX DRM 74
* 1 White Kyurem-GX DRM 48
* 3 Altaria DRM 40
* 2 Altaria-GX DRM 72
* 2 Tapu Lele-GX GRI 60
##Trainer Cards - 33
* 2 Tate & Liza CES 166
* 2 Mysterious Treasure FLI 113
* 2 Switch SLG 67
* 1 Lillie UPR 125
* 2 Timer Ball SUM 134
* 2 Devoured Field CIN 93
* 3 Ultra Ball SUM 135
* 3 Nest Ball SUM 123
* 2 Apricorn Maker CES 124
* 3 Cynthia UPR 119
* 3 Guzma BUS 115
* 2 Sightseer LOT 189
* 1 Dragon Talon DRM 75
* 2 Choice Band GRI 121
* 1 Dragon Talon DRM 59
* 2 Energy Loto GRI 122
##Energy - 12
* 3 Fairy Energy Energy 9
* 3 Water Energy BLWEnergy 9
* 4 Rainbow Energy BKT 152
* 2 Fire Energy XYEnergy 4
Total Cards - 60
****** Pokémon Trading Card Game Deck List ******
##Pokémon - 15
* 1 Ditto {*} LOT 154
* 4 Swablu DRM 57
* 1 Latios {*} CES 108
* 1 White Kyurem-GX DRM 74
* 1 White Kyurem-GX DRM 48
* 3 Altaria DRM 40
* 2 Altaria-GX DRM 72
* 2 Tapu Lele-GX GRI 60
##Trainer Cards - 33
* 2 Tate & Liza CES 166
* 2 Mysterious Treasure FLI 113
* 2 Switch SLG 67
* 1 Lillie UPR 125
* 2 Timer Ball SUM 134
* 2 Devoured Field CIN 93
* 3 Ultra Ball SUM 135
* 3 Nest Ball SUM 123
* 2 Apricorn Maker CES 124
* 3 Cynthia UPR 119
* 3 Guzma BUS 115
* 2 Sightseer LOT 189
* 1 Dragon Talon DRM 75
* 2 Choice Band GRI 121
* 1 Dragon Talon DRM 59
* 2 Energy Loto GRI 122
##Energy - 12
* 3 Fairy Energy Energy 9
* 3 Water Energy BLWEnergy 9
* 4 Rainbow Energy BKT 152
* 2 Fire Energy XYEnergy 4
Total Cards - 60