At times, a card wont have hexproof inherently
I actually think this is a really fun build-around, since you can tap into both Clue and Detective synergies from Murders at Karlov Manor
By using a few simple, definitive tests, you can confidently spot even the most sophisticated counterfeits
If you have to put Gothorita into play, I would recommend using Psybeam for sure the first turn so you can for sure do some damage and confuse the defending Pokemon, then depending on how lucky you're feeling would determine if you would use Double Slap which has the potential to do 40 damage, or Psybeam which does 20 damage every turn the next turn
And Zabaz is great
For anything over $500, I only buy professionally graded cards from PSA, BGS, or CGC