In the game you press the
button to execute a Pail Bash, just do this behind the wandering enemies and you'll initiate combat and do a small amount of damage to them at the beginning as well.
A good place to do this is after you get the boat in the Bayou section and travel to the separate island as the wandering enemies there keep respawning when you engage a different enemy in combat, i.e. you fight 1 battle and as soon as you start a 2nd battle the wandering enemy from the first battle will reappear.
Posting this under my new ID on TT.