Adds a challenge to the challenge mode helper.
The challenge id.
The challenge value.
The challenge severity.
Runs the Challenge game to the summon phase.
Optional
species: Species[]A promise that resolves when the summon phase is reached.
Transitions to the start of a battle.
Optional
species: Species[]Optional array of species to start the battle with.
A promise that resolves when the battle is started.
Helper to handle Challenge mode specifics