The former Barcelona boss ignored overtures from the likes of Chelsea and Manchester City in favour of last year's Champions League runners-up and it was confirmed on Wednesday afternoon that the Spaniard had signed a three-year deal with die Roten.
"I heard his name on Tuesday on the radio, while I was at the club having a massage," Robben told Algemeen Dagblad.
"But you do not know as a player whether or not it is true. You think, it could be a stunt, because he could go anywhere.
"I think it is a very interesting choice and I think at first glance Guardiola may fit well at Bayern.
"He is an adventurous and attacking coach, who fits at a club that shows guts."