Back to the Future: The Game

*Missable* After Cueball has given you the postcard of Trixie, talk to him again and ask him what is wrong with his teeth, twice. This will cause him to Give you a box of Algae cakes. Now you must simply give one to everyone. You will need to equip them, then interact with:

--Cueball
--"Guy"
--Edna
--Arthur
--Trixie
--Doc
--Emmett.

After offering the Algae Cake to the last person, the trophy will unlock.

Refer to the Trophy Walkthrough under "To The Expo!" , for more.