If Lapras has left the Research Breakthrough in January, it's to be replaced by Woobat! This is the first time this Pokémon from Unova has entered the game, so you'll be able to complete your Gen 5 Pokédex.
This new Research Breakthrough begins on Saturday, February 1, 2020, at 1:00 p.m. to Sunday, March 1, 2020, at 1:00 p.m. PST
And to celebrate this month of love, you'll collect more Woobat candy each time you catch it. A good way to make it evolve easily into Swoobat.