When you won that battle and got your trainer card, it was your pass into the finals (which were held at a secret location - hence the name)
Click KEN 1/14: Costing is too generous here, easily 2R
Weakness: Darkness Resistance: Fighting Retreat: 0 Melmetal VMAX - Metal - 330 HP Pokmon - VMAX - Evolves from Melmetal V MMM G-Max Juggernaut 160+ This attack does 60 more damage for each extra [M] Energy attached to this Pokmon (in addition to this attack's cost)
Like the other time, he will give you a rare card if you can defeat him
Artists are often at conventions and tournaments, signing cards for a small fee
On top of all of that, you can't use this attack again in the next turn, so you are forced to retrieve Sandy Shocks from the Active Spot, wasting even more resources you might not have in the late stages of the match