>>12382354Assuming you are going with the IAU definition of a "planet," anything with enough mass to clear its orbit and be in hydrostatic equilibrium will ALWAYS be an oblate spheroid simply due to physics over geologic time scales. Its hypothetically possible for a planet to form in weird fucking shape, but the objects own gravity will always pull the mass in as compactly as possible and the motion of it's own spinning will force that compact mass into an oblate spheroid.
The reason that asteroids and comets (and even small moons and planetoids) can have weird shapes is because their mass is either insufficient for them to be in hydrostatic equilibrium or they have a weird spin or unusual gravitational interactions with a parent or child body.
Tl;dr hypothetically it's possible but any celestial body with sufficient mass will always form an oblate spheroid over geologic timescales.
