This pack contains one of 13 different possible sidekicks with these probabilities:
Nugget - 7.69%
NarratorX - 7.69%
Aquascapeman - 7.69%
Squirmybean - 7.69%
Sketch Art Set - 7.69%
Szszsz - 7.69%
Mallory - 7.69%
Lovely Pals - 7.69%
Boid - 7.69%
Furry Goblin - 7.69%
Wombly - 7.69%
Hunter - 7.69%
Shrimpy - 7.69%
A sidekick boosts your mining power for the related collection up to 50%.

Sidekicks also add 100MP per level when equipped, no matter which NFTs you have staked.