Question from someone who is just getting into more “technical” sides of the game

Is there any way to make Falinks better atleast just a bit? Because of Mega Falinks coming in soon and my Dynamax one is almost a hundo T-T

Prefferably a free to play way of course, though i have my ways otherwise unless it would be too expensive

And I heard about these "bottle caps" but I don't know how they work much