Ethen Baker, 24, pleaded guilty to recklessly causing injury to the victim on a Mount Pleasant footpath on December 12, 2017.

He was sentenced to three months' imprisonment at the Ballarat Magistrates' Court on Wednesday.

The court was told Baker and two co-accused attended the Kenworthy Place address in a stolen Holden Commodore.

They exited the vehicle and spoke to the victim about his alleged treatment of his ex-girlfriend, who was the female co-accused and the male co-accused's new girlfriend.

The female co-accused stabbed the victim in the leg before she and Baker dragged the victim down a driveway and onto a footpath where the male co-accused punched, kicked him to the head and stomped on him.

The victim suffered grazes and a stab would.

Baker told police he could not remember the incident.

Magistrate Ron Saines described it as a "pretty savage bashing".

He said Baker and the female co-accused dragged the victim down a driveway where he was bashed and he held Baker accountable because he was there.

"You were lucky you weren't implicated in the stabbing. You participated and helping others is enough for criminal responsibility," Mr Saines said.

"You have no right to go around there and act as a vigilante."

At a previous court hearing, the male co-accused was sentenced to nine months' imprisonment while the female co-accused was jailed for 87 days.

The court was told Baker was at Zagames, Ballarat, on February 1 when he was arrested and remanded in custody after he failed to appear at court for seven driving offences.

The driving offences occurred across Ballarat in November and December, 2019, and January and February, 2020, when Baker held a learner's permit.

He drove without an experienced driver and did not display L-plates on four occasions.

Defence barrister Bethany East said her client did not have the privilege of a parent to teach him how to drive.

She said Baker was in a stable relationship and had a child and had employment in Geelong.

For the driving offences, Baker was fined $2327.40, including court costs, and his driver's licence was suspended for three months.

He pleaded guilty to 12 charges.

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