Seatoon is a purple Seadring inhabiting Dreamy Driftwood Shore in Mario & Luigi: Dream Team. He is one of Seadric's three siblings, who informs him of Mario's and Luigi's arrivals. When Prince Dreambert and the brothers meet him, he immediately confuses them with characters from a television show and requests they transform and pose as those characters do. Dreambert tells Mario and Luigi to go along with it and has Mario, whom Seatoon confuses with Red Seadring, to naturally pose as he believes the character would. Seatoon becomes excited, then despondent when the pose is incorrect. He informs Mario the pose is actually Green Seadring's. Mario and Luigi attempt to pose together, though Seatoon is still unsatisfied.
When Seatoon realizes they are not the characters after all, he becomes disappointed for a moment and happy when he realizes they were just trying to be nice to him, informing them he assumed the heroes were coming when Seadric called him. Seatoon then rewards them with his Dream Egg. When Dreambert brings up finding Princess Peach, Seatoon becomes excited once again and informs them resucing a damsel in distress is just what the Super Seadrings would do. However, when they attempt to strike poses again, he tells them not to. Finally, he simply wishes them luck before vanishing.
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