This is much better in Expanded. The Ability is busted - Exeggcute lets you heal 60 every turn for free which means you need to swing for a minimum of 170 damage just to 2HKO this beast and that's assuming you don't do any other healing such as Mixed Herbs or Great Potion which raises the 2HKO damage minimums to GX attack levels. Meanwhile, 180 damage is enough to cleanly 2HKO every Tag Team in the game (fun fact, Reshizard is exactly 2HKOed after a double Mixed Herbs heal) as well as one-shot just about every Basic GX, which by the way is completely unresisted since nothing resists Dragon. GX attack is nothing to write home about but it is a way to end the game, and it's not that bad since you flip all your Prizes first. Toss a Choice Helmet on this thing and watch the damage just melt away. You can even go full meme and use the Ludicolo from Detective Pikachu for an additional 30 heal per Ludicolo per turn, lol. The hardest part is going to be attaching Energy, but at least you have DDE in Expanded to let you start swinging while you build up a dude on the Bench.