The Pikachu ex deck is one of the best Electric-decks in Pokémon TCG Pocket, and is still considered fairly strong in the meta even after the release of Mythical Island. There are a lot of cards that could work well in this deck, but the known deck is fairly set in stone at this point, and the second release didn’t change it very much. This deck requires a fair amount of strategy, as Electric-type decks can be quite vulnerable if you don’t play them correctly.

https://screenrant.com/pokemon-tcg-pocket-pikachu-ex-deck-cards-strategy/