Each Ob-La-Di, Ob-La-Da looks like a small, flat, round disc resembling a cookie, with six stubs protruding from its edges. It visually has a four-toed paw print on its back. When duplicated, the bodies seem to link together via their stubs. Akefu calls Ob-La-Di, Ob-La-Da an insect but notes that its species aren't technically insects, as they lack a three-segmented body or jointed legs.
Ob-La-Di, Ob-La-Da is a parasitic Rock Organism, as it feasts on other organisms' blood and bodily fluids. It is shown to be virtually motionless, only moving whenever attacking or being attacked. It is shown to protect its master, Wonder of U, and it can be inferred that it is subservient to Toru. Ob-La-Di, Ob-La-Da's species target any animal from above or below.
Ob-La-Di, Ob-La-Da is afraid of water, as it prefers to live in dry areas and is shown to shriek whenever it's submerged underwater. As a Rock Organism, it also hates storms and rising waters.
Despite its small size, the organism is shown to be relatively strong enough to deflect Soft & Wet: Go Beyond's bubbles.
Ob-La-Di, Ob-La-Da can latch itself onto its victims, like a tick, via a highly sticky substance secreted from its underside. This is effective for the Rock Organism to burrow into the victim's skin and absorb their essence. This creature inhabits a cliff in the wilderness and jumps down on other animals passing beneath it. Once latched, it sucks the body fluids and blood of its victim.
Ob-La-Di, Ob-La-Da can spawn copies of itself at a rapid pace from its victim's blood to the point of overwhelming its victim within seconds. Attempting to attack or pull off one of the pads spawns more of its bodies, proving any attack against it seemingly futile. When the body multiplies, its copies form out of one of its stubs.
Ob-La-Di, Ob-La-Da deflects the incoming bubble and latches itself onto Josuke's hand, eating at his flesh. Josuke tries to pry the insect off, but to no avail; the organism clings on and spawns duplicates of itself all over Josuke's arm. He tries shooting at the Rock Insect, but Ob-La-Di, Ob-La-Da again duplicates itself, swarming him until it completely covers his body. He then tries to fire one last shot at Wonder of U, but Ob-La-Di, Ob-La-Da spawns some duplicates over his finger, deflecting the bubble. Losing energy as Ob-La-Di, Ob-La-Da continues devouring him, Josuke eventually collapses.
However, Josuke manages to hit Toru with an invisible bubble, which helps decrease the severity of what Ob-La-Di, Ob-La-Da is inflicting on Josuke. He manages to stand up and, after quickly consulting a map, finds the shower room of the hospital and dives into a pool, which causes the Rock Insects to drown. They shriek, and their corpses surface as they detach from his body.
All-Star Battle R (Various)