This card is very good for a uncommon class. The card surpass cards with the similar ability like abomasnow and wigglypuff cg (rare cards) and it's is uncommon.
His pokebody add sleep and poison to the attaking pkmn. If only sleep is a trouble, think in poison and sleep.
His attack: 50 for 2 grass energys and prevents ALL EFFECTS OF ATTACKS. No status, no energy removal with attacks, no "put damage counters on venomoth" (goodbye dusknoir), no smokescreen, no imprison and shockwave, etc. Only damage for venomoth and his attack is quick for a stage 1 pkmn.
his amount of HP is small, for a massive hp decks and brutal attacks of this pkmn (especially fire type).
If venomoth has a 100 HP, venomoth can be a rare card.
His weakness agaisnt fire is bad, because this is the most popular type, brutal attacks (and now in this edition, a very speedy type). venomoth has no match with decks with infernape and magmortar.
His resistance agaisnt fighting type is pretty good because this type also is popular, is speedy but doesn't have several damage to the defending pkmn, and rarely cause status (machamp confuses for example). Lucario does to venomoth only a 20 damage per turn.
His retreat cost is 1, good to stage 1 pkmn, but Considering his nature of flying pkmn, the retreat cost could have been zero.
in conclution, venomoth is a good card except for his HP and weakness, but don't understimate his speed and pokebody, remember: The player makes the card, not the card makes the player (this word is dedicated to a trainers obsessed for blissey).
My rank
Modified : 8,5/10.
Limited: 9/10.
Unlimited: 4,5/10.