I have no idea who this Naruto kid is (Bart Simpson with Liza's hair?), but if he more or less equals a mid-level brick armed with something edgy he sure beats Doomsday. Tired of Doomsday wank here - he's just a glorified Abomination.
doomsday stomps, nothing before sage mode naruto can take down doomsday, unless he goes tailed beast mode. Though even then its debatable, because doomsday can potentially absorb bijudama, which is the most destructive capabilties of 4 tails Naruto.
Though maybe if he summons Gamabunta, he could slice him up with his sword. Still not sure though.