This is definetly a tough deck to get used to. You have to be able to manage your own board while locking your opponent. It's a great deck. But misplays can cripple you severely.
Trashalanche is more of a late game cleaner, or your main counter to Buzzwole decks. And surely, the number of items should be enough so that you take a 1HKO.
****** Pokémon Trading Card Game Deck List ******
##Pokémon - 19
* 1 Oranguru UPR 114
* 4 Zorua PR-SM SM83
* 4 Zoroark-GX PR-SM SM84
* 1 Kartana-GX CIN 106
* 3 Tapu Lele-GX GRI 155
* 3 Trubbish BKP 56
* 2 Garbodor GRI 51
* 1 Garbodor BKP 57
##Trainer Cards - 33
* 4 Puzzle of Time BKP 109
* 1 Professor Sycamore STS 114
* 1 Rescue Stretcher BUS 165
* 4 Ultra Ball PLF 122
* 1 Parallel City BKT 145
* 1 Evosoda GEN 62
* 4 Float Stone BKT 137
* 2 Cynthia UPR 148
* 3 Guzma BUS 143
* 2 Brigette BKT 161
* 2 Choice Band BUS 162
* 3 Field Blower GRI 163
* 3 N NVI 101
* 2 Enhanced Hammer GRI 162
##Energy - 8
* 4 Unit Energy {L}{P}{M} UPR 138
* 4 Double Colorless Energy EVO 90
Total Cards - 60
****** Deck List Generated by the Pokémon TCG Online
www.pokemon.com/TCGO ******
And here's a recent list that did well. Top 8 for that matter.
Hope this helps.