We have some news for our Trainers regarding rare candy’s impact on Gen 3 longevity. These news concern with the Gen 3’s lifespan and difficulty which probably would’ve been heavily reduced with the addition of the rare candies.
To finish the dex in Gen 2, you need 2250 in candy cost. This number also includes the cross-gen evolution. If we take out the gen evolutions the number goes down to 1575 total new candies.
We assume that (and also based on few tests done, thanks to Pinataman20) to finish Gen 3 Pokedex you need up to 3400 total newly introduced candies.
This proves that Gen 3 might need some serious time spent in the game. Gen 3 will bring a bigger number of Pokemon and way more evolution lines than Gen 2 had. It is nice to say that there are no evolutions of old Pokemon.
So, Gen 3 requires a lot more rare candies than Gen 2 and I hope that Niantic will not put final evolutions as Raid Bosses.