I wouldnt be surprised to see it in 60-card formats, and Im positive itll be a new Mardu Commander staple soon
I did that recently with some childhood cards and its a good feeling (despite receiving a 3, but hey)
Luffy [Serial Prize] ST01-001 commands an even higher PSA 10 price (~SGD $47,736)
Number 4: Gold Pikachu 2016 20th Anniversary Promo ($29,500) 2016 was a huge year for Pokmon
As a last resort compared to Tentacruel and Frosmoth, you can also consider Psyduck and Golduck , with Golduck able to dish out a whopping 70 damage for just two Energy
However, the biggest appeal to me is the wrath protection: Wilhelt ensures you still have a board post-Wrath of God, negating one of the biggest weaknesses of many typal decks