"I'm ready, I'm ready," the striker said. "I was pleased to score against Ecuador and pleased to get another 60 minutes.
"I've trained hard, no injuries or recurrence of the groin strain I had at the end of the season. I always would have needed game time such as the first game at Wembley and against Ecuador. I felt really good, especially in the heat."
Scholes claimed the 28-year-old may be past his peak. But Rooney says he is worried only about the opinion of Hodgson and rejected theories that Scholes could have spotted something when he returned to United as a coach under interim manager Ryan Giggs.
"I'm not really interested in what anyone else has got to say," Rooney said. "I'm interested in what Roy Hodgson and the coaching staff here and the people around me say. Paul Scholes has been a teammate, but he's been away from the first team for a long time ... He's got his opinions, so let's leave it at that."
Hodgson started Rooney on the left against Ecuador after playing him behind Daniel Sturridge in the victory over Peru.
"The manager didn't have to tell me what to do," Rooney said. "I know how to play that role on the left. I've played it many times and I have no problem doing that. I can play in different positions. I've proved that over the years. It is not about me, it's about the team."
Rooney or Sturridge have scored in five of seven games they have played together for England. Rooney believes this proves they can form an effective partnership in Brazil if given the chance to do so by Hodgson.
"Daniel's a fantastic player," said Rooney. "He can score goals from anywhere like he did at Wembley. We have trained a lot together so, hopefully, we can take that form into the tournament."
Rooney's usual No 10 role was taken by Ross Barkley, whose barnstorming performance won rave reviews. Vice-captain and England veteran Frank Lampard believes the Everton midfielder has the same fearless streak that made Rooney a Euro 2004 England revelation.
Rooney burst on to the international scene in Portugal as an 18-year-old Everton teenager. He briefly became the youngest scorer in the tournament and netted four goals in four matches for England.
Lampard captained the team in which Barkley set up Rickie Lambert's goal and terrified the Ecuador defence, and the 35-year-old can see why Everton's 20-year-old is being compared to a young Rooney.
"There's a lot of similarities in there, in their build, where they come from and where they play," said Lampard. "Again, it's that fearlessness of youth. Great ability on the ball, taking out, running at people with the ball ..."
Hodgson said Barkley would have to improve his decision-making, but Lampard is confident that will come with experience.
"It's great for the team to have players in those attacking areas who can make things happen," he said. "I'm sure he will have learnt a lot from the game in terms of positions to pick up, times to turn, times not to."
Meanwhile, in his blog for Irish bookmaker Paddy Power, Scholes has suggested that Hodgson should find a team place for Danny Welbeck for the Italy game to help stop Andrea Pirlo.
"Even though England's Euro 2012 game against Italy finished 0-0, we paid nowhere near enough attention to Pirlo," Scholes wrote.
"Danny Welbeck, a good defender who can nick the ball, could be an option and would be a bold decision, one which gives England a creative outlet and saddles Pirlo with defensive work."
