Pixelmon Stylers, using minigames to work only on wild pokemon
Pixelmon do useful things once captured using a styler such as allowing you to temporarily ride it.
Hope this can be implemented!
the idea for the Gigaremo would be this, it would be placed by a Dim Sun Grunt (one per NPC) that would make wild pixelmon around it automatically get swapped to a new status i'd call "controlled" where they'd initiate battles with all trainers on sight and refuse to join the ranger. the Gigaremo could be broken with a pickax but a ranger would have an easier time getting rid of it as, just in the game, pixelmon assisting the ranger are not classified as wild giving them immunity to the Gigaremo. also recall though that after they would assist the trainer in bringing down the Gigaremo they'd return to the wild (or in this case despawn).
just adding on to the thought