After finishing a stage, I got informed that the helper Pokémon I have been using lately is now friendly to me. What does that mean? Do I get any benefits?
So here the altered answer, sorry I overread your tag below :/
I don't own this game by myself, but friendly pokémon are WAY stronger than unfriendly ones. To make a pokémon friendly just keep playing with them.
- later in the game you can use Support Pokémon
- use them over and over to make the more friendly towards you
- this makes attacks slightly stronger and they will be more likely to appear at the later parts of a stage"
As I don't own this game, I may just send you this second source:
"Friendly Pokemon are stronger than unfriendly ones. In another topic, someone said that a 1-star friendly Pokemon was equal in strength to a 5-star unfriendly."
I hope this just became useful :D