With the possible implementation of super bosses I thought it would be a fun idea to throw in a super boss concept.
Boss: King Midas
Location: Mirage Island
Possible Rewards: Nature Re-roll ticket, Stat Re-roll ticket, Turn a legendary pokemon into shiny variant
Requirements: 1m per challenge attempt, Complete pokedex for all regions including evos
Cooldown: 2hrs on player loss, 24 hrs on player win (in effect you may only win against him once per mirage island appearance)
The idea is about creating a super boss that would entice more accomplished players/collectors and at the same time serve as a viable money sink.
The boss would have a team full of shiny pokemon to be more fun and to fit his theme, and would be located at Mirage Island to serve as an additional barrier to accessibility as well as give mirage island additional content apart from zorua.
Players would be required to pay a sum of 1m JUST TO CHALLENGE the boss. I believe this sum requirement helps in creating an extra money sink for people that have managed to gather a big sum of currency. The boss would follow difficulties and rules set for super bosses to be comparable to the possible rewards suggested.
Possible rewards would be pve tokens. a chance at either nature re-roll tickets, iv re-roll tickets, or (at a small chance) being able to turn a legendary pokemon into its shiny variant. I believe the amount of rewards given in terms of re-roll tickets should not be more than the required sum to challenge the boss and at the same time not too few that they would affect their trade price.
Why legendaries?
Legendary pokemon are shiny locked and this would be a great opportunity to add content for collectors who want their shiny legendaries. Also this makes sure that pokemon affected by this boss are UNTRADEABLE and purely for the sense of accomplishment of the player.
Other ideas would be locking the npc behind a quest that requires the player to show him a shiny pokemon with 150+ iv's, or a lvl 100 OT ditto xD