people sometimes catch a very good ivs pokemon but with bad nature, this will make the players feel very bad as they can't change nature unless it is legendary. To be honest, i caught an ada all 25+ larvesta today, and I felt very bad and though to leave the game before i calmed down. Hunting take a lot of time and it will be disappointing if nature rr is not usable on normal pokemon

I would say -1 to this, unless the Nature Reroll Ticket was sold by an NPC, this item would be untradable and once you use this item onto a pokemon, the pokemon becomes untradable. It should also be extremely expensive. Otherwise no, it would completely break the market that we would only hunt for high IV, then just afford a Nature Reroll and resell the pokemon.

-1 its completely useless 

-1 

If hunting should be made easier and/or less frustrating Id prefer the gen8 sync being implemented instead. 

Nature changing would have massive impact on the market if made easily available. 

Iirc there was a nature change given to a player from last summer tournament for winning. That's fine imo because it's very limited. 

-1 It would destroy the game and market.

looool nooooooo wayyyyy those go for 100+ so why ruin people also epic fails are funnnyyyyyyyyy

No, this reward remains for the summer tournament for now.