[Feature] [Challenge] EEVEE_ONLY

[hayuna]

Is your feature request related to a problem? Please describe. New challenge to allow play only using Eeveelutions

Requirements

• Classic win
• Eevee unlocked

Describe the Feature

• Allow to choose only eevee as a starter
• Cost of eevee could be reduced to 1 (to be able to take 6 of them) [optional]
• Unlock stones to evolution faster with higher percent of find them in the shop
• Unlock gigantamax to evolution faster with higher percent of find them in the shop

Reward Achievement Eevee Trainer after complete challenge

[Tempo-anon]

I wonder if you can do this with some kind of challenge that just overrides the user's initial team as well as changing some item weights

[hayuna]

Also need to be changed possibility to add the same species to the team. Right now there is a condition to not allow it