>Ralts and Kirlia both state that they will grow better, stronger and more beautiful if the trainer is full of positive emotions>Gardevoir, what you get after a lot of time training, repays your love with her absolute loyalty (selflessness to the point you'd give your others is pure loyalty).>Chances are that gardevoir is still like its pre-evos. She still has that telepathy power where she gets better around positive vibesIt's a simple calculus, love is a positive emotion, gardevoir likes positive emotions, loving gardevoir makes her stronger, gardevoir giving its life for you at all costs if time comes is a return of love on her part. The Dex entry may not state that gardevoir will do things to make their trainers happy but guarding them with their life is enough of an implication that gardevoir at least cares about its trainer, so basically what
>>46546664 said.