Chatterbox: Talk for multiple times.
Eaten: Get a badger to eat you!
FireClan Invasion: Turn yourself into a fire clan cat and go to different clans.
Welcome to Cold Waters: Go onto the pink clouds.
When Lucy was Young and Kind: Get the Lucy outfit (In the Kitty pet place) and then turn yourself into a kit.
All By Myself: Play the game alone.
Invisible: Thank LuckyBunnyHearts for answering it!