List of Research Breakthrough rewards

Listed below are the previous Research Breakthrough rewards:
 * 3000x XP
 * , which is either:
 * or.
 * or.
 * or.
 * or.
 * or.
 * or.

July 2018
In July, 2018 for the first time there was non-legendary Pokémon encounter available from Research Breakthrough, also for the first time it was Pokémon with exclusive move.

December 2018
In December, 2018, there was pool of various Pokémon added as Research Breakthrough that rewarded with one random encounter instead of guaranteed Pokémon featured for specific month.

Trivia

 * As with Pokémon encountered as a reward for completing a Field Research task, Pokémon encountered for completing a Research Breakthrough will be level 15.
 * Research Breakthrough encounter is currently one of two only methods of capturing Legendary Pokémon, the other being Raid Battle Bonus Challenge encounter.