Preheat the oven to 375 degrees and line a baking sheet with parchment paper.
In a large bowl, combine the shredded chicken, buffalo sauce, and softened cream cheese until evenly mixed.
Stir in 1/2 cup of the shredded cheddar cheese until it is fully incorporated into the chicken mixture.
Scoop out portions of the mixture and shape them into 12 small balls, then roll each ball in the remaining cheddar cheese followed by the panko breadcrumbs.
Place the coated balls on the prepared baking sheet and bake for 15 to 18 minutes until the coating turns golden.
Remove the bites from the oven and let them cool for a few minutes. Insert one pretzel stick into the top of each bite to form a stem.
Sprinkle the sliced green onions over the bites before serving.