Avenatti, who had previously represented adult film actress Stormy Daniels, was convicted Friday for trying to extort money from Nike.
High-profile attorney Michael Avenatti denied attempting to extort Nike for more than $20 million after federal prosecutors in New York charged him.
"@MichaelAvenatti, if you plead fast enough, you might just get to share a cell with Michael Cohen!" Trump Jr. tweeted.
"We have discovered substantial evidence that he and certain enablers engaged in systematic witness intimidation, evidence tampering, physical threats, and payments to witnesses."
"Mr. Kelly is a predator and a criminal who has prayed on young, vulnerable girls for far too long. The time has come for him to finally be held accountable for his actions."
At a hearing, the judge did not issue a ruling but seemed to favor Trump and his attorneys' view that the suit no longer had legal grounds.
"Of all the cover-up options, spray-on is THE WORST. Even worse than utilizing Michael Cohen," said Avenatti.
"Is it true (asking for about 100 million friends)?" Avenatti tweeted at Trump Jr.
Attorneys representing the president are seeking legal fees of hundreds of thousands of dollars from the adult film actress.
"I think the field is shaping up to be even more advantageous for someone like me, not less," said the lawyer and Trump critic.
"To all the people that want to divide us for their own agendas: It is not going to happen," Avenatti wrote.
Avenatti has also floated the idea of suing TMZ for an article about an alleged domestic violence incident.
Politics, Daniels said, was a "much dirtier" business than pornography.
The Fox News host said that his daughter was confronted by the man while on an evening out at a country club.
Avenatti called for the president's indictment "in light of the sworn testimony and evidence relating to the payment to my client and Trump's involvement."
The Senate Judiciary chairman suggested Avenatti and Swetnick tried to "knowingly mislead the committee" during the confirmation of Brett Kavanaugh.
Attorney Jason Frank accused Michael Avenatti of owing him millions for previous work at the Eagan Avenatti LLC law firm.
"He's going to go after you regardless," an MSNBC panelist said of trying to "out-Trump" the president.
"Shouldn't we expect the POTUS to maintain a minimal level of physical and mental fitness?" Avenatti tweeted
Avenatti said the mixed martial arts fight would be for three rounds and "would be for two great causes."