Vileplume: For the Ability, I feel it would be much cleaner to say "[...] each of your [G] Pokemon can't be affected by Special Conditions." That is much cleaner wording and in card games clean wording of cards is essential into making them appeal to people. This is pretty minor for a true custom fake, but it's something to keep in mind.
Bellossom: No wording errors here but the design of the card throws me off due to the difference in effect sizes. If you keep the size of effects the same the card will have a much cleaner look, as well as being consistent with other cards.
Petilil: I feel the effect size is very small and could just be the same size as most other effects. Again, this makes it look more consistent with other cards.
Carnivine: Same deal as Bellossom. Sick Ability/Attack combo though, more of this would be great!
Foretress Lv.X: "whenever one of [...]" should be "whenever 1 of [...]" This is another consistency thing, you want all of your numbers to be nice and friendly. Also the disparity in text size, there's a lot of empty space in the attack section, you can easily expand the size.
Leavanny: Same deal as Forretress, numbers in Pokemon are never written as words. "Two" should be "2."
Snowver: Text size disparity.
Abomasnow: For some reason the Ability's effect isn't justified.
Abomasnow Lv.X: There is an empty place holder in the first attack.
Chandelure: What's with that last attack? Did you forget to put a 1 in front of the 30? It's ridiculously underpowered.
Ninetales: Text size disparity.
Ninetales Lv.X: Text size disparity.
Torkoal: Text size disparity.
Fletchinder: Text size disparity
Talonflame: Now this card has been made clumsily. The first attack has suffered a lack of proofreading. There's no point to discarding any Energy the way the attack works now because you'll get the 10 damage spread anyway. If it was meant to do 10 damage times the number of Energy discarded, then it would work. You also probably want to specify Benched Pokemon and put in the good old "(don't apply Weakness and Resistance for Benched Pokemon)" clause to keep it fair. As the card stands, the second attack is useless but would make sense on a version with a fixed first attack.