[Feature] Ideas for additional Candy Friendship methods

Is your feature request related to a problem? Please describe. Right now, I feel like the acquisition of Candy is rather slow — and even slower for the non-ace members of my party who don't get to spend much time in the limelight due to me grinding out my ace's Candy specifically. While this could be alleviated with a direct buff to the basic friendship sources we already have, I feel like this could instead be made more interesting of a grind by adding some more sources for friendship points.

Describe the Feature Some potential sources of Friendship I think would be nice include:

Being non-fainted in the party when you defeat a trainer is one of the most common friendship sources. Representing this by adding bonus friendship gain for this event would be a nice extra reward for clearing these challenging waves.
Being non-fainted in the party when you defeat an Evil Team boss, Elite Four Member, Champion, or Rival is more difficult than the usual trainer battle, so gaining slightly more friendship for these would be a good reward.
In Pokemon Crystal, a pokemon's friendship gain from winning battles was doubled if you were in the biome where it was caught. This mechanic feels like it'd translate fairly naturally to Pokerogue since it already tracks this.
Giving a pokemon a TM, vitamin, or held item from battle loot could be rewarded with a small +1 friendship.
Being in the party when you beat the game could give a very large Candy Friendship boost, as a reward for keeping them around to the end.
Adding a dedicated Friendship-raising item (e.g. a use-on-give berry) to the loot table. I imagine such an item would probably want to be placed in the Great or Ultra pools so they don't show up so often as to be unhelpful.

Additional context

pagefaultgames / pokerogue

[Feature] Ideas for additional Candy Friendship methods #2939