One of the most common questions both new and old Pokemon players constantly wonder about when a New Pokemon Game hits the market is what Starter Pokemon they should select when beginning their new journey. Though any Mainstream Pokemon Game can be won no matter what Starter Pokemon is chosen, this remains a popular question. Usually, most players pick whatever Starter Pokemon they personally like best, especially since it truly doesn't matter which you pick. However, some players are a little more strategic than this, wondering which Starter Pokemon will have more success against Gym Leaders and what Starter Pokemon will make the game a little more difficult and competitive.
As a whole, selecting Scorbunny will make things much easier for yourself, especially if your playing Pokemon Shield since you get to face a Ghost Type Pokemon Gym and Ice Type Pokemon Gym rather than a Fighting Type Pokemon Gym and Rock Type Pokemon Gym. The main reason for this is because Scorbunny eventually will evolve into Cinderace, and it will learn the move Pyro Ball when it does. Pyro Ball has a Base Power of 120, which is actually a Base Power of 180 when calculating the Same Type Advantage Boost. Couple this with Cinderace's great Attack Stat and an item like the Life Orb or Charcoal, and you can literally spam against any Pokemon not resistant to Fire Type Attacks for the entire game after evolving into Cinderace.
But if you're looking for more competitive run through The Galar Region, it might be best to go with Grookey as your Starter Pokemon. Grookey will have a number of advantages against a handful of the Gym Leaders, but, as a whole, it simply won't compare to Scorbunny or Sobble as the three evolve. Grookey's final evolution, Rillaboom, does have decent statistics and a nice exclusive move in Drum Beating that helps make it outspeed most Pokemon, but it simply doesn't compare to Cinderace and Inteleon (Sobble's Final Evolution). Those two are much quicker than Rillaboom, and that is crucial when in battle. It also doesn't help that Leon, the Galar Region Champion, will have not one but two Fire Type Pokemon in your final match of the Main Story.