Why do I have a holographic Larvitar Pokemon Card?

It is not really a holo. It is probably a reverse holo. If it is a regular holo the actual picture is holo. You see in 1 pack you get a rare card, and 1 reverse holo card. A reverse holo could pretty much be anythin, except card with a silver frame (lv.x, ex, etc.) so a larvitar is a reverse holo!