Ashhki

Hello, This is my first time logging out in more than a year and i lost the 5 pokemon in my team but i still have all the progress the badges and the pokedex. Is there a way to recover them ? i don't remeber all of them but i had a Raichu, baltoise, gyarados, charisard and venusaur gengar that were over lvl 70 and some others around lvl 50. Thank you,