From the Super Mario Wiki
“Your world is so cool! If only I weren't..a sign.”
—Bill Board, Super Mario Galaxy
The Boards in the Super Mario Galaxy games are four sentient signposts capable of speech. In Super Mario Galaxy, they tell Mario how to perform a particular move each time he meets them. Some boards appear in multiple locations, but their ability to transport themselves is not explored. The names of all four are puns on "billboard". The boards also appear in Super Mario Galaxy 2 with the same role as in the first game. In the Supermassive Galaxy, rather large boards appear on the first planet.
Gil Board is the first of the boards to be encountered. He is a signpost that tells Mario how to Wall Jump. He claims to be the "Famous Gil Board" and claims Mario knows him, although Super Mario Galaxy is the first appearance in which he has been specifically named. He appears in Honeyhive Galaxy.
Bill Board is the second board encountered, and the Board with the most appearances. He teaches Mario how to roll the Star Ball in the Rolling Green Galaxy, Melty Molten Galaxy and Rolling Gizmo Galaxy. He also makes an appearance at the celebration in the Grand Finale Galaxy. Here, he tells Mario that he lives in a nice world, and that he would be able to enjoy it more if he wasn't a sign. Bill Board is the same sign as in Super Mario 64.
In Super Mario Galaxy 2, he appears in the Rolling Masterpiece Galaxy, once again teaching Mario how to roll on the Star Ball.
Phil Board is the third board encountered. He teaches Mario how to move when he is in a Bubble. He appears in the Bubble Breeze Galaxy and Bubble Blast Galaxy.
Jill Board is the fourth and final board to be encountered. She reminds Mario how to control his Boo Mario form. Her only appearance is in Boo's Boneyard Galaxy where she reminds Mario how to play as a Boo.
Names in Other Languages
|Pun on "掲示板"(keijiban, Japanese for bulletin board).|
Pun on "看板" (kanban, Japanese for billboard).
Pun on "伝言板" (dengonban, Japanese for message board).
Pun on "瓦版" (kawaraban, Japanese for newspaper).
|Pun on letrero (Spanish for signboard).|
Pun on pancarta (Spanish for banner).
Pun on rótulo (Spanish for label).
Pun on cartelón (Spanish for billboard).
||Pun on panneau d'affichage (French for billboard).
|Pun on informare (Italian for to inform).|
Pun on notizia (Italian for news).
Pun on avviso (Italian for warning).
Pun on messaggio (Italian for message).