I think it would be a good idea if a link to the list of all secret avatars was shown next to the cancel option on avatar selection. It would say "List of all avatars here", "here" having an imbeded link. As a player who normally uses marnie-master3 as their main avatar, I know it's hard to find the list. I only found out about mine because of the global announcement that new avatars were added. I understand that adding all avatars on the main list would be difficult to implement but I feel like this could be easier to implement and invite more avatar customization.