Tonge, who has spent the last eight years at Bramall Lane, has penned a four-year contract - the same length of deal than that signed by former Palace man Soares.
Speaking about the Tonge deal, Pulis told the club's website: "I am delighted to have signed a player like Michael. I have been a long-time admirer of him and he will bring a lot to our squad.
"He can play in a number of positions, which is important, and he will add some balance to the squad."
Meanwhile, Soares cost Stoke £1.25million from Crystal Palace and the Potters are pleased to have capture a 'very talented English player'.
Chief executive Tony Scholes said: "Despite being only 22 years old he has amassed over 150 league appearances and also has Premier League experience.
"He is a player the manager rates extremely highly and we believe he will prove to be an excellent signing for the club."
Centre-back Higginbotham has resigned from Sunderland, penning a three-year deal after the two clubs agreed an undisclosed fee.




