This is just Dragon's Bagon (#50), that (for whatever bizarre reason) has been released as a Promo.
Everything in it appears to be the same as the Dragon Bagon, with the exception that there's a "PROMO" symbol where the Dragon symbol would be, in addition to the words "GENCON" being printed on it.
Soo what's the deal here??? (Couldn't they choose a better existing Dragon card to release as a PROMO???? (Those Charmanders, Charmeleons and Charazards would have been good choices! )