Schnatter resigned as chairman of the company's board amid the controversy, though he would later say he regretted his decision to step down.
Schnatter has alleged that the board may have staged a "coup" against him, and claims in the lawsuit that the company has treated him in an "unexplained and heavy-handed way" following accusations that he had used a racial slur.
The spokesperson said the company was disappointed that Schnatter filed a "wasteful lawsuit" and that it had given him all the materials he was entitled to as a director.
"Rather than address the real issues like the health of the business, the company is hiding documents that, we believe, will disclose the actual facts as to what is occurring here, including using Mr Schnatter as a scapegoat to cover up their own shortcomings and failures", they added.
The lawsuit was the latest installation in a weeks-long drama surrounding the pizza chain following a report by Forbes this month that Schnatter had used the "n-word" during a media training call that led to his ouster as chairman.
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Meghan dressed in a tea-length Carolina Herrera resort dress in dark denim, featuring a v-neck and cap sleeves, for the event. She paired her ensemble with Aquazzura stilettos and complemented the outfit with a J.Crew clutch.
Schnatter says he has been falsely accused, and calls his resignation a mistake.
Papa John's said earlier this week that it would implement a "poison pill" stock dilution that would act against any move by Schnatter to take a bigger stake.
Schnatter said in the interview that the company's performance had suffered under Ritchie.
Schnatter, who founded the chain 34 years ago, also feels the documents will help explain his comments last fall about how the national anthem protest by NFL players was hurting the chain's sales.
The directors have terminated a so-called founder's agreement that made Schnatter the pizza brand's face and voice, asked him to stop media appearances on behalf of the company and evicted him from his officers in the company's Louisville HQ.
Papa John's shares closed down 23 cents Thursday at $44.45 after trading as low as $43.95, just two cents above a 52-week low of $43.93 and well off a 52-week high of $81.09.