I heard that it makes unevolved pokemon's defenses boosted by 50% but I also heard that middle pokemon like Grottle and Shelgon are only boosted by 30% is this correct.
Yes it does. If the pokemon hasn't evovled to its full stage it want get the boost. Never heard of a 30% boost
How to change your username
How to add a user avatar
Why was my post hidden?
Flags vs Downvotes
Official PokemonDb League
Type a Pokemon name, type, move or ability to see instant results.