Before you laid a portal, with the colors Red, Orange, Yellow, Green, Light Blue, Blue, Purple, and Pink highlighted on a circular console. On a piece of paper nearby would be your explanation:

"Summon one character from any franchise/reality to interact with and tickle! The only limitation is they must have that color as part of their palette, and you can summon up to 8 at once! Choose wisely! :) ~ A friend"