The little i played and i saw one unique thing that everyone do in the Pokemon mistery dungeons game, and it’s literally visiting the persian bank, so basically this is a suggest to add the persian bank to the game, also with it, you could transfer to another player you have in your frind list, so you could help your friends with it or make it posible to buy the item you both like with the money of both.
Also been thinking in pelipper, in the previous games i used a lot the pelipper rescue system, but i saw it lack something, a mailbox system wich you could let “messages” to friends, not letting items to friends by this, just messages they can read whenever they open it or not, and they can expire by 7-14 days from last opening of it.