Gym Challenge is a set in the Gym series. It was released on 16 October 2000. The printed size is 132, and the checklist is the same length. Lt. Surge's Secret Plan is 107/132, in position 107 of 132 on this checklist. Before it is 106 Koga, and after it is 108 Misty's Wish. The listed rarity is Rare.
Lt. Surge's Secret Plan is a Trainer card.
Ken Sugimori illustrated this card. The same name is on 1,112 other cards in the catalog.
The card text says: Put 1 card from your hand face down onto your Bench. (You can't play this card if your Bench is full.) Treat that card as a Basic Pokémon as long as it's face down. Flip the card if either player needs to know what it is in order to use an attack, a Pokémon Power, or a Trainer card. Flip the card if it ever uses an attack or Pokémon Power, evolves, retreats, is damaged by an attack, or is otherwise affected by an attack. At any time during your turn, you may flip the card over. When you flip that card over, if it isn't a Basic Pokémon, discard it and all cards attached to it.
I keep a set binder for Gym Challenge, meant to hold every card of that set. This card is one slot in the Gym Challenge set binder. Themed lists that include this exact card are Kanto Gym Leaders and their Pokémon and Lt. Surge and his Pokémon. I still need this card.