How can you tell your card is this one?

Look at the bottom of your card: you should read SK 83/144 there. Its illustration is signed Midori Harada.

Which set does it come from?

It comes from the Skyridge set, released here on 12 May 2003.

Skyridge

Name: Nidorina SK 83
Brand: Pokémon

SKKOCommon

We cannot estimate this card right now.

Check the number and illustration against the card you are looking for.

How can you tell your card is this one?: Look at the bottom of your card: you should read SK 83/144 there. Its illustration is signed Midori Harada.
Which set does it come from?: It comes from the Skyridge set, released here on 12 May 2003.

Skyridge landed here on 12 May 2003.

Its characteristics and effects in play, with the original text when available.

The Korean text is not available yet. Text shown: English.

Flip a coin. If heads, the Defending Pokémon is now Poisoned.

Have a look at what it does well, then at what will get in your way. After that you'll know whether it belongs in your deck.

Keep in mind
None of the 5,624 tournament lists we have read runs it. That does not make it a bad card — it means we have not seen it on a table yet.
Keep in mind
Weakness Psychic ×2. Against a Psychic Pokémon, apply that to the damage it takes — it climbs fast. Of the 5,624 tournament lists we have read, 3,345 run at least one Pokémon of that type.

None of the tournament lists we have read mentions this card. That happens with a card that has just come out, or one players have not tried yet.