| Games: Sonic the Hedgehog (16-bit), Sonic the Hedgehog (8-bit), Sonic Adventure 2, Sonic the Hedgehog 4: Episode I, Sonic Colours, Sonic Colours (Nintendo DS), Sonic Generations, Sonic Generations (Nintendo 3DS), Sonic Dash, Sonic Lost World, Sonic Mania, Sonic Forces
| Affiliation(s): Eggman Empire, Deadly Six
| Hits to defeat: 1
| Points: 100
Chopper, called Batabata (バタバタ) in the Japanese manual, is the gnashing piranha fish Badnik that leaps up from under bridges to attack in Green Hill Zone in the 16-bit version of Sonic the Hedgehog, as well as in Bridge Zone on the 8-bit version. They can be easily destroyed by jumping on them as they come up; one should always be wary of them when one crosses a bridge.
Sonic Adventure 2
Chopper made a repeat appearance in the bonus Green Hill stage in Sonic Adventure 2. It is very similar to Sonic 2's Masher. It awards 100 points and releases an animal when destroyed.
Sonic & Sega All-Stars Racing
After a long hiatus, Chopper is brought back to feature in the Seaside Hill tracks (Lost Palace and Ocean Ruin) in Sonic & Sega All-Stars Racing, as an obstacle in water pits. After this game, the badnik appears most regularly.
Sonic the Hedgehog 4
A redesigned Chopper that more closely resembles Sonic 2's Masher in appearance appears in Splash Hill Zone in Sonic the Hedgehog 4 Episode I. A toy version of this Chopper can be purchased as an Xbox Live Avatar Prop.
Choppers appear in submerged parts of Aquarium Park in Sonic Colours.
Choppers appear as enemies in Green Hill in Sonic Generations, as well as in the same level in the Nintendo 3DS version. A giant one is featured chasing Sonic down a system of rails in Modern Sonic's Act, and another giant one will eat Sonic if the player decides to abuse the hydroplaning effects of the Sonic Boost and stray too far off-course in Seaside Hill.
Choppers reappear in Sonic Dash, jumping out of the ocean whenever the player has to cross large gaps in the road. Upon encountering Choppers, the player must use the Homing Attack on each one to cross the gap and continue their endless run.
Sonic Lost World
Choppers reappear in the Wii U/PC version of Sonic Lost World where they have been given a more cartoonish design like many other Badniks. They can be found in Windy Hill Zone 1 and 2, Frozen Factory Zone 1 and Sky Road Zone 1. In the 3D sections of the game, Choppers usually jump over bridges that lead across rivers or oil lakes instead of directly attacking the player, while in the 2.5D sections, they retain their attack patterns from the classic games, albeit slower. Skeletal Choppers can be seen in Sky Road Zone 4 jumping out of the sandy slides to attack Sonic.
Choppers reappear in Sonic Mania, where they once again inhabit the Green Hill Zone. This time around, there are two variations: the first behaves identically to the original version from Sonic the Hedgehog, leaping up from underneath bridges to attack the player; the second functions similar to Sonic 2's Chop Chop, slowly swimming horizontally through the pools of water found throughout the stage, and speeding up while snapping its jaws if the player gets too close.
Choppers reappear in Sonic Forces. In this game they acquire a militaristic look, like the other Badniks in Sonic Forces, and appear again in areas located in Green Hill, like Lost Valley and Green Hill itself. As in their previous appearances, Choppers jump under bridges to hit the player. At the end of Green Hill, a series of Choppers appear as the bridge collapses into a cinematic style while the player passes by.