Blue Toad is a playable character in the New Super Mario Bros. Series.
New Super Mario Bros. Wii
Blue Toad first appears in New Super Mario Bros. Wii. In this game, he is seen in the beginning cutscene when Princess Peach is kidnapped by Bowser Jr. and the Koopalings. He follows Mario, Luigi and Yellow Toad as they chase Bowser's airship. Blue Toad can be played on multiplayer. He also appears in the ending cutscene and the credits along with Mario, Luigi and Yellow Toad.
New Super Mario Bros. U/New Super Luigi U/New Super Mario Bros. U Deluxe
Blue Toad appeared in New Super Mario Bros. U. He appears in the opening cutscene where Bowser and the Koopaling's airships invade Princess Peach's Castle and throw Mario, Luigi, Yellow Toad and Blue Toad far away from the castle. Blue Toad can be a playable character in multiplayer, and appears in the ending cutscene and the credits. He acts exactly the same as in New Super Luigi U too.
Blue Toad along with Yellow Toad are featured in the 41st and 42nd volumes of Super Mario-Kun. As the story is based on New Super Mario Bros. Wii, Blue Toad and Yellow Toad are introduced as Mario's new accomplices. Throughout the adaption of the two issues, Blue Toad plays an important role by journeying alongside Mario, Luigi, and Yellow Toad on their quest to rescue Princess Peach from Bowser and his forces.
Both Blue Toad and Yellow Toad are seen in their propeller forms on the cover of the 41st issue of Super Mario-Kun.
Mario & Luigi: Paper Jam
Blue Toad appears in a total of four Battle Cards in Mario & Luigi: Paper Jam.
Mario Sports Superstars
In Mario Sports Superstars, Blue Toad appears in two different collectible cards as Blue Penguin Toad and Blue Flying Squirrel Toad.
Blue Toad and the other heroes of New Super Mario Bros. Wii were shown as some of the featured characters in the Nintendo 3DS tech demo. He was riding a Pink Yoshi, similarly to the game's box art. Eventually, this tech demo screen featuring Blue Toad and his friends was later obtainable as a puzzle in the Puzzle Swap mode in the StreetPass Mii Plaza.
Blue Toad, Mario, Luigi, Yellow Toad, and Miis, were also seen and playable in the Wii U demo New Super Mario Bros. Mii.
Blue Toad alongside Yellow Toad, Mario, Luigi, the Koopalings, and various other characters from New Super Mario Bros. Wii made cameo appearances in the Wii game Taiko no Tatsujin Wii: Minna de Party Sandaime where the characters can be seen dancing to the various tracks featured in New Super Mario Bros. Wii
In New Super Mario Bros. Wii, Blue Toad is shown as a courageous character, who is able to venture alongside the Mario Bros. on their dangerous mission to save Princess Peach from Bowser and his minions; a force that most Toads tend to be afraid of. He is also shown to be kind and compassionate as seen in the ending of the game where he happily invites Luigi to ride in his and Yellow Toad's hot air balloon after he had been abandoned by Mario and Peach. In the introduction of New Super Mario Bros. U, Blue Toad is shown to be even more finicky than his partner Yellow Toad as he is seen to be in an extreme alarm when Bowser's mechanical arm pulled away the Princess.