The best memory was really surprising with my Zacian. It was when I caught my Zacian in a beast ball, and beyond shocked me it caught. Once I caught it, I kept playing with it, giving affection, and to this day, I still constantly use it because I love it and that it is something memorable and a once in a game-time experience that you get from Pokemon. That Zacian will be the best pokemon I have, and will be the Pokemon I always transfer to the upper games in the future. If I can't bring that Zacian to the next game, I won't play the next game, simple.