Stumble wears an orange and green costume with red buttons running down it. He wears a green hood and red shoes.
Stumble gives you the following puzzles throughout the game Professor Layton and the Miracle Mask:
Prologue: The Dark Parade
When Professor Layton and Luke arrive in Monte d'Or, they notice Stumble has got himself tied up in a bunch of balloons, and so help to free him. He thanks them for their help, and continues on with the festivities.
Chapter 1: The Mask of Chaos
While Professor Layton and the group are conducting their investigations after the petrification incident, they bump into Stumble once again, startling him and resulting in him dropping his banners. He once again requests assistance to help him sort out his banners.
Seen in a special episode, Stumble notices Puck singing the carnival song, and almost trips on his feet. He then somehow gets tangled in Puck's balloons, and Juggles approaches them to see the commotion. After telling Stumble to return the balloons to Puck, he starts juggling for him, and Puck wonders how he was so good at his tricks.
Chapter 3: The Battle of Monte d'Or
Upon leaving the One-Ring Circus tent, Professor Layton and the group find Stumble outside the tent advertising the circus. He is eager to show the group his bear sticker collection that he had finished arranging in his break, however he loses one, and so Layton helps him out. Afterwards, he suggests that he can fly like the Masked Gentleman to hand out flyers about the circus, but remembers he is afraid of heights.
Chapter 5: Miracles Unmasked
Stumble is seen on Carnival Square handing out flyers, to which Luke says he was glad to see him untangled. Stumble tells him that he had finished putting up posters, and so was helping to hand out flyers instead. Luke notes that thanks to his hard work, people could enjoy the festivities, to which he takes the compliment.
Chapter 7: The Reunion Inn
Stumble vents to Emmy and Luke that he was sure that Tyrone hated him, as he had him handing out flyers and putting up posters constantly. He wanted to be able to do important circus stuff, but Luke tells him that without him, they wouldn't have heard about the One-Ring Circus. This made Stumble feel a lot more responsible for the circus.
Later that night, they find that Stumble is once again tied up in balloons, and so Professor Layton helps him out. He reveals to them that Tyrone had tied him up in the balloons, as he had eaten his pudding. He didn't want Tyrone to know he had told them, as he feared he would be tied in so many balloons that he would float away.
"After eating all of Tyson's favorite snacks, poor old Stumble has been relegated to dishing out pamphlets and putting up posters. He's a master of his craft, which is, namely, making an bumbling idiot of himself wherever possible."