Sally Acorn, reimagined in a blend of Regular Show, Gravity Falls, Star vs. the Forces of Evil, and The Loud House styles, would be a whirlwind of chaotic energy and quirky charm.

Personality & Appearance: Her core personality – brave, resourceful, and fiercely loyal – would remain, but amplified by the stylistic influences. She'd retain her spunky attitude and quick wit, but with a heightened level of absurdity reminiscent of Mordecai and Rigby's antics in Regular Show. Her appearance would be a vibrant mix. Her classic red dress might be updated with a more exaggerated, almost cartoonishly oversized design, perhaps with mismatched patterns or unexpected additions like pockets overflowing with bizarre gadgets (a nod to Gravity Falls's mystery box aesthetic). Her hair would likely be more dynamic and expressive, possibly with strands defying gravity or changing color unexpectedly, like Star Butterfly's hair. She might even have a signature quirky accessory, like a constantly malfunctioning device or a talking animal sidekick, echoing the whimsical elements of all four shows.

Setting & Story: The setting would be a blend of familiar locations with surreal twists. Instead of a traditional forest, her home might be a bizarre, ever-shifting landscape, incorporating elements of the Regular Show park, the Gravity Falls woods, and perhaps even a dimension-hopping portal system. Her friends and family would be a mix of anthropomorphic animals with exaggerated personalities (like Regular Show), quirky human characters with hidden depths (Gravity Falls), and a large, chaotic family dynamic reminiscent of the Loud House. The plots would involve a mix of everyday shenanigans, surreal adventures, and epic battles against bizarre villains, all infused with the unique humor and storytelling styles of the source material.

Specific Examples:

• Regular Show Influence: Sally might find herself embroiled in absurd workplace conflicts with her friends, working at a bizarre job like a dimension-hopping pizza delivery service or a magical acorn farm. The humor would be fast-paced and rely on slapstick and witty dialogue.

• Gravity Falls Influence: Mysteries and conspiracies would be woven into the narrative. Sally might uncover a hidden secret about her family history or discover a hidden world beneath her seemingly normal town. The storytelling would incorporate cryptic clues, hidden symbols, and a sense of looming mystery.

• Star vs. the Forces of Evil Influence: Sally might possess magical abilities, perhaps connected to her acorn heritage, and face off against powerful interdimensional villains. The action sequences would be dynamic and visually stunning, with magical spells and fantastical creatures.

• Loud House Influence: Sally's life would be filled with the chaotic energy of a large, dysfunctional (but ultimately loving) family. Her interactions with her siblings and extended family would provide ample opportunities for comedic conflict and heartwarming moments.

In short, this blended Sally Acorn would be a character brimming with personality, humor, and adventure, a unique fusion of the best elements from four beloved shows. Her stories would be unpredictable, visually striking, and filled with the kind of chaotic charm that would appeal to fans of all four source materials.