Use Psychics (including the three ghosts) and have some good Trainer cards to help
As newer games and regions have been introduced, Hippowdon has remained a staple for those looking for a reliable Ground-type, providing a solid counter to Electric, Poison, Rock, and Fire types
The most successful decks in Pokmon TCG Pocket almost always use one or more ex cards
Notable cards like Cloud Strife, Hero of Midgar , Lightning, Savior of Cocoon , Sephiroth, Fallen Angel , and Tifa, Martial Artist provide both playability and monetary value
*UPDATED* "Prisoner Dragon of the Ice Barrier" Level 5 - WATER Dragon/Synchro/Tuner/Effect ATK/ 500 - DEF/ 2300 1 Tuner + 1 or more non-Tuner WATER monsters When Synchro Summoned: Draw a number of cards equal to the amount of materials (both Tuner and non-Tuners) used for the Synchro Summon of this card
That will feel pretty good