Comedian Simon Brodkin, best known for his appearances as Lee Nelson, had performed the stunt while playing the role of comic character Jason Bent, who satirises the footballer lifestyle.
Brodkin, who was dressed in the Manchester City away kit, was led away by stewards and charged with entering the field of play, which comes under the Football Offences Act.
At a hearing at North Liverpool Community Justice Centre on Wednesday, he was issued with a six-month conditional caution.
Raymond Shaw, defending, told the court: "It was intended to be a humorous act and intended to be funny.
"It is clear from the television footage that some of the players were amused but he didn't know it was a criminal offence. He expressed his remorse immediately when he was spoken to by the club and the police and he does so again now."
Brodkin appeared as Jason Bent - alongside a 'WAG' named Crystal - when he left the court and addressed the media in a Liverpudlian accent.
"I've got a lot of people I want to thank. Firstly Carlos Tevez for giving me a lift into court this morning," he said in reference to the Manchester City striker, who was given a 250-hour community order for motoring offences on the same day.
"Crystal, who's been there for me every step of the way ever since we met in the hotel last night. Thanks also to the judge, who was sat on the bench but unfortunately didn't get a game."
Information from the Press Association was used in this report