Hint Toad is one of six members of the Toad Brigade, a group tasked with helping Mario. It is the brain of the group.
He first appeared in Super Mario Galaxy. Later, we find it in the second opus in the series, Super Mario Galaxy 2, Super Mario Odyssey, but also in a game dedicated to the Toad brigade: Captain Toad: Treasure Tracker.
His help is invaluable thanks to his extensive knowledge. In the game Captain Toad : Treasure Tracker, he gives a Super Mushroom to Captain Toad or Toadette when they approach him.