Command

Very easy, I don't think it needs explaining.

config/
└── CobbleBetterNPC/
    ├── NPC/                 ← NPC JSON Files

{
  "id": "cobblebetternpc:command_001",
  "type": "command",
  "resourceIdentifier": "cobblemon:standard",
  "names": ["Click Me"],
  "interaction": {
    "type": "command",
    "options": [
      {
        "name": "Reward one",
        "permission": "",
        "with": "1",
        "commands": [
          "say {player} I dont have anything for you right now."
        ]
      }
    ]
  }
}