Part of growing up is leaving things behind...but that doesn't mean you have to leave EVERYTHING from your childhood behind. Pokemon was a VERY LARGE part of my childhood and it doesn't feel right to just let it go...so I wont. If there is something from your past that you want to hold onto, revisit or just have a hard time letting go of then don't. If someone makes fun of you or whatever for it who cares? Now a days people give others a hard time for anything and EVERYTHING. It's old news. So like what you want. It's okay. You don't have to fully let go.