The Gym Challenge set didnt add anything new to Pokmon TCG, and is essentially just Part 2 of Gym Heroes
Marcy: If you have a lot of cheap artifacts and/or tokens lying around, this is basically a 1 mana 5 damage instant that potentially generates more mana for you, so that's a pretty solid spell
I would caution you against running too many lands that come into play tapped, so just keep that in mind (less than 25% is ideal)
Argothian Enchantress Argothian Enchantress is the classic version of the effect
Trainer cards can also be broken down into different types, but unlike Pokmon cards, these types outline the role the card plays rather than describe characteristics or powers
Creature - Dragon Color tag templates(None) Good-Fortune Unicorn Whenever another creature you control enters, put a +1/+1 counter on that creature