Details have been released, though they're more or less the same as what Coro Coro leaked. You do need to buy six pre-sale tickets if you want all six Ash Hat Pikachu. Each pre-sale ticket comes with a serial code to redeem an Ash Hat Pikachu as well as Pikashunium Z. Each serial code can only be used once. You may redeem more than one code per game if you bought more than one pre-sale ticket for multiple Ash Hat Pikachu, but you may only redeem Pikashunium Z once. All Ash Hat Pikachu are male with the ability Static and their
moves are as follows:
Original Cap Pikachu (level 1): Thunderbolt, Quick Attack, Thunder and Agility
Hoenn Cap Pikachu (level 6): Thunderbolt, Quick Attack, Thunder and Iron Tail
Sinnoh Cap Pikachu (level 10): Thunderbolt, Quick Attack, Iron Tail and Volt Tackle
Unova Cap Pikachu (level 14): Thunderbolt, Quick Attack, Iron Tail and Volt Tackle
Kalos Cap Pikachu (level 17): Thunderbolt, Quick Attack, Iron Tail and Electro Ball
Alola Cap Pikachu (level 20): Thunderbolt, Quick Attack, Iron Tail and Electro Ball