It can also ambush in to block a champion if needed, but at 2 defense it is vulnerable to all 0-cost removal except Lash
Depending on your deck, you might also want to look at Clever Concealment, Flawless Maneuver and Cosmic Intervention the latter of which is a lot of fun with fetchlands and mass land destruction, or board wipes when you run a lot of strong EtB effects
Sacrifice Sinkhole to destroy a nearby site
While tempo decks do want to play on the front foot and be the one swinging sideways, it is also important to be able to play defensively when youre behind
Most of the best decks in Pokemon TCG Pocket are built around rare ex cards, such as Mewtwo ex or Charizard ex, and even if youve only one of these to spare, there are still plenty of alternative mons to use alongside them while you wait for the luck of the draw to be on your side