Master Ball. Cost: 450 coins. Effect: The highest performance Poke Ball. Allows you to capture a wild pokemon without fail.
Ultimate Raid Pass. Cost: 500 coins. Effect: Allows you to join an unlimited number of raids for 24 hours.
Egg incubator (Infinite). Cost: 1000 coins. Effect: Use this to incubate your eggs. Unlimited use!* (You can only have up to 3 of these.)
X Attack/Defense: Cost: 100 coins. Effect: Use these items to boost your defending pokemons’ stats for 8 hours (Or until it is knocked out of the gym)!
Poke Radar. Cost: 50 coins per use. Effect: Reveals the exact locations of nearby pokemon within 300 meters!
VS. Seeker. Cost: 50 coins per use. Effect: If another trainer uses this item nearby, you can initiate a battle with them! (Winner is rewarded with 500 XP and 200 stardust)
Aspear Berry. Cost: 200 coins for 10. Effect: Use this berry on your buddy pokemon to reduce its walking requirement for 6 hours!
My thoughts on these items:
Master Ball - would probably only be available at an event in very limited quantities. It would just be too overpowered.
Ultimate Raid Pass - one of these will probably arrive eventually, maybe in a different form or another seven day streak reward (other than evolution items).
Egg Incubator - I doubt these will ever come, Niantic just want that little bit extra money.
X Attack/Defence - good concept, but would there be a limit on how many you could use on one pokemon? If it arrives, there would be a lot of technicalities.
Poke Radar - there will probably be an improved nearby list rolling out in the future, no real need for this to be introduced.
VS. Seeker - Why need this if PVP is coming soon? (probably soon)
Aspear Berry - This one might be introduced, but probably just drops from stops.
Unlimited Raid Pass would be great! I want that…
Infinite Egg Incubator - we’ll never see that for sale.
X Defence - it would work if that would actually help your Pokemon defend a gym… it’s just to easy no metter what…
Lol, thanks Pat! Yeah, it would be great if Niantic would implement at least some of these things. These items would be hard to get with the new 50-coin limit, though…