This page focuses on Big's story in Sonic Adventure: Chaos Unleashed.

Here are the links to the other stories:

Main article: Sonic Adventure: Chaos Unleashed/Sonic's Story
Main article: Sonic Adventure: Chaos Unleashed/Tails' Story
Main article: Sonic Adventure: Chaos Unleashed/Knuckles' Story
Main article: Sonic Adventure: Chaos Unleashed/Amy's Story
Main article: Sonic Adventure: Chaos Unleashed/Gamma's Story
Main article: Sonic Adventure: Chaos Unleashed/Super Sonic Story

Big's Story

Somewhere in the Mystic Ruins jungle area, Angel Island from a far distance is falling down the ocean, causing the ground to shake. Sleeping on a hut lies Big the Cat. His pet frog, aptly named Froggy awakens and spots Chaos. Froggy bites off Chaos' tail causing him to grow his own tail. Big wakes up and is worried about Froggy, who is driven insane by the possession. Froggy devours a yellow Chaos Emerald, which Big calls his lucky charm, and runs away. Worried, Big follows his amphibian friend.

When the sun rises, Big finds himself in Station Square.

Adventure Field: Station Square

Minutes later, Big sees the crazed Froggy go in the sewer underneath a car.

Adventure Field: Station Square

Stage 1: Twinkle Park

Big manages to find Froggy, but the crazed amphibian retreats to the train station.

Adventure Field: Station Square, Mystic Ruins

Stage 2: Ice Cap

Adventure Field: Mystic Ruins

Just then, Big walks up to the waterfall area where he sees Tails holding Froggy. He goes to Tails, but trips on a branch. Tails is startled, causing him to lose grip of Froggy as a result. Realizing that Froggy is Big's pet, Tails apologizes for not holding him tight enough. Big goes to chase Froggy at the train station.

Adventure Field: Mystic Ruins, Station Square

Big finds Froggy heading inside the Station Square hotel.

Stage 3: Emerald Coast

Finally catching Froggy, Big turns to go home, but out of nowhere, Gamma grabs the frog from Big and heads back to the base, with the worried feline pleading behind.

Adventure Field: Station Square, Mystic Ruins

In the Mystic Ruins jungle, Big spots Gamma from a far and watches him go inside Eggman's base. He bravely goes inside. After sneaking inside the base, he finds Gamma at the Egg Carrier's launching site getting inside the flying fortress. He quickly gets inside just seconds before it begins to launch.

Big arrives to the interior of the Egg Carrier, and tries to pick up Froggy's scent, but fails, so he decides to find him in the Hot Shelter.

Adventure Field: The Egg Carrier

Stage 4: Hot Shelter

After clearing the stage, Big finally catches Froggy, reunited with his friend at last. Before Big could find an exit, he and Froggy are transported to the Emerald Shrine 4,000 to the past. 

Adventure Field: Mystic Ruins (The Past)

Big meets Tikal for the first time. Tikal was inspecting the Emerald shrine and in front of her was the Master Emerald, in which she comments that it was the one that controls the Chaos Emeralds. Big returns to his normal time with Froggy, desperate to leave the Egg Carrier. 

Adventure Field: The Egg Carrier

With the Egg Carrier losing altitude, Big rushes outside of the Egg Carrier and spots Chaos 4. Eggman with Orbot and Cubot spots Big holding Froggy, and demands that he gives it to him. Big strongly refuses. Eggman orders Chaos to attack Big, but Froggy steps in front of the monster, much to Big's surprise (Orbot and Cubot were surprised too). Froggy spits out the yellow Emerald while Eggman gives Chaos the cyan Emerald. Thus, Chaos is now Chaos 6.

Then Chaos sucks Froggy into into his body, restoring the beast's tail, much to the horror of Big. Just then, Sonic arrives and realizes Chaos' sixth transformation. Big decides to fish Froggy out of Chaos' body with the help of Sonic.

Boss: Chaos 6

After Big saved Froggy, Sonic tells him that he'll handle Chaos 6 as he leaves for safety. Big thanks the blue hedgehog for his help and leaves.

Adventure Field: Egg Carrier

Big spots the Tornado 2 and flies to the jungle moments after the flying fortress self-destructs and crashes into the Great Sea. After arriving to the Mystic Ruins jungle, Big and Froggy are now at home, and are at peace again. Froggy is no longer insane, and Big is celebrating.

THE END...

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