The horns are less curved and have spiky purple hair around the bases.
Hoopa Confined was officially revealed in the February 2015 issue of CoroCoro magazine.
Pokemon unbound is a pokemon rom hack based on the original pokemon firered version.
This second option is obviously not the ideal way, and unless you're playing on easy, you probably won't be able to do it in one shot.
Sprites of the Pokémon move around on the screen, and you have to manually aim your Poké Ball to catch the Pokémon, and you can use Berries to help make things easier.
Mel clears the way for you, in the least gentle way possible: a Miltank's Body Slam straight to the Grunt's face.