Use some Water Pokemon in your deck because he does use Ponyta and Rapidash, which will easily knock out your Grass Pokemon

Academy Manufactor Ant-Man's Army Apothecary White Astrid Peth Bake into a Pie Bakersbane Duo Banquet Guests Bartered Cow Bill the Pony Bog Naughty Bonecache Overseer Bosco, Just a Bear Brandywine Farmer Brenard, Ginger Sculptor Bristlebud Farmer Bumbleflower's Sharepot Bumi's Feast Lecture Bushy Bodyguard Butterbur, Bree Innkeeper Cache Grab Camellia, the Seedmiser Campsite Cuisine Canyon Crawler Cat Collector Cauldron Familiar Cirith Ungol Patrol City Pigeon Common Black Removal (playtest) Concession Stand Concession Stand Concession Stand Concession Stand Corpseberry Cultivator Courier of Comestibles Creeping Crystal Coating Crumb and Get It Curious Forager Curious Pair Curious Pair Devouring Sugarmaw Devouring Sugarmaw Eager Trufflesnout Eastfarthing Farmer Elanor Gardner Elephant-Mandrill Experimental Confectioner Fae Offering Farmer Cotton Fat Ass Feasting Hobbit Feasting Troll King Featherbrained Filcher Feed the Cauldron Feed the Cycle Fell the Pheasant Field-Tested Frying Pan Fierce Witchstalker Food Coma Food Fight Foreboding Fruit Fortifying Provisions Galadriel, Gift-Giver Generous Ent Giant Mana Cake Giant Opportunity Giant's Skewer Gift Shop Gift Shop Gilded Goose Gingerbread Cabin Gingerbread Hunter Gingerbread Hunter

The second is to provide you with reasonable scenarios that you actually might find yourself in, and be able to advise on when to make what play
2 Serperior Double Your Energy Serperior may not be an ex Pokemon, but it brings one of the most powerful Grass Abilities to Pokemon Pocket
MTG Wiki defines ramp as A card which accelerates your mana, giving you an additional, reusable mana source beyond the usual one land per turn