Raikou
How it was given out: Premium File 3.
Japanese promo, released 2000.
One of 278 promos from 1999 to 2003 listed on this site.
As long as Raikou is your Active Pokémon, Raikou and Energy cards attached to it aren't affected by effects from Trainer cards other than Stadium cards. As long as this Power is active, discard any Trainer cards attached to Raikou. (This power works even if Raikou is Asleep, Confused, or Paralyzed.)
If your opponent has any Benched Pokémon, flip a coin. If heads, choose 1 of them and this attack does 20 damage to it. (Don't apply Weakness and Resistance for Benched Pokémon.)
Illustrator: Naoyo Kimura
This card was included in the Neo Revelation expansion. In Japan, it was one of nine Unnumbered Promotional cards available in the Premium File 3, released on November 23, 2000.
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Card notes adapted from Bulbapedia (CC BY-NC-SA).
Unofficial fan reference. Pokémon and card artwork © Nintendo, Creatures, GAME FREAK and The Pokémon Company.