Shmipper and Smabble

The Mabel and Dipper Lookalikes are two characters (both male and female), that first appeared in "Tourist Trapped". Their names, birthday, and other information are currently unknown. They are sometimes used as complete opposites of Mabel and Dipper They have a grandpa who shows his loving affection towards them, a contrast towards Grunkle Stan.

"Tourist Trapped"
The Mabel and Dipper Lookalikes first appeared in "Tourist Trapped", running around in circles during a barbeque. It is unknown if they were with their family at the time, or not. It is possible they were used to mimic what Dipper believed everyone else's summer was like; while his was terrifying.

"The Legend of the Gobblewonker"
The Lookalikes appeared in "The Legend of the Gobblewonker", this time with their grandpa. In a fishing boat, the Dipper Lookalike expressed how much he loved grandpa. Nearby, Grunkle Stan heard the whole thing, and "booed" the three. That made the grandpa mad, and the Dipper Lookalike mentioned that "maybe he has no one who loves him, papa." Which made Stan sad.

"The Hand That Rocks the Mabel"
In the scene where Grunkle Stan has the flashback of Gideon being an "evil trouble", you can see the lookalikes adoring Gideon's van as well as other cameos seen throughout the series. The lookalikes later appear in the Tent of Telepathy watching Lil' Gideon's show.

"Irrational Treasure"
They are both seen in the crowd watching Pacifica. And on a wagon with there family in the intro.

Personality
The Lookalikes seem to be very cheerful, and happy kids. They are usually seen laughing and smiling.

Appearance
The Lookalikes are twins, and bare a similar look to Mabel and Dipper. The Lookalikes both have brown hair, small noses, green eyes, and freckles on their cheeks. The Dipper Lookalike is usually seen wearing a red t-shirt; whereas, the Mabel Lookalike is usually seen wearing a pink t-shirt. The Lookalikes are commonly seen smiling.