The Bayern Munich star saw one penalty appeal waved away after he skipped past Santi Cazorla but was successful in the dying moments when challenged by Arsenal's Laurent Koscielny
Bayern beat the Gunners 3-1 on aggregate to progress to the Champions League quarter-finals following a 1-1 draw on Tuesday night and the Dutchman was at the heart of the action.
The former Chelsea man saw his first appeal for a penalty waved away after he beat Santi Cazorla in the area and then tumbled to the ground but he was later successful when brought down by Laurent Koscielny in the dying minutes.
Wenger took the opportunity to lay into the Dutchman, who also won a spot-kick in the first leg which got goalkeeper Wojciech Szczesny sent off.
|15/8||Bayern Munich are 15/8 with Bet365 to go on to win the Champions League|
"He's a fantastic player, one of the best in the world, but he doesn't need to do it. He gets in front of a player then slows down and goes down. If [the referee] gives him a yellow card for the first one he won't do it again."
Wenger was adamant after the first leg that Szczesny should not have been sent off for the incident with Robben and he still believes that it was the key moment in the tie.
"Overall what made the difference was the decision to send the keeper off in the first game," he continued. "That was a bad decision and made a huge impact. [It was] the same player [Robben] who won penalty [on Tuesday] and that's the regret we had. We gave everything."
Arsenal could only name six substitutes for the clash because Ryo Miyaichi, who had travelled with the squad to Germany, was ineligible.
The Japanese attacker is registered on the Gunners' 'B' list of players but Uefa rules state that a player on that list needs to have been at the club continuously for three years to qualify - and, due to the fact that he has spent time out on loan, the midfielder fell foul of those regulations.
But Wenger insists that the issue did not make a difference, adding: "He was not eligible because he was not qualified. We took him out of the list and Uefa informed us he was not eligible. Honestly I don't think it had an impact."