The former Spurs, Manchester City, Arsenal and Real Madrid star has signed a deal until the end of next season, ending the Togolese forward’s recent exile from the game.
The striker, who has scored 96 goals in 230 league games, has been without a club since leaving Spurs by mutual consent.
The likes of Charlie Austin were linked with a move to the Eagles but he ended up at Southampton while Pardew instead plumped for the controversial African.
'Can he be bothered?'
And pundit Shearer has made a damning prediction over the player's future with his new club in his latest column on Coral.
"Crystal Palace took a chance on Emmanuel Adebayor on a free transfer and it will be interesting to see how that works out," Shearer wrote in his Coral blog.
"He might come into the club, score five goals from now until the end of the season, earn a new contract and then not play for three years.
"I am not sure how fit he is because he has not played for such a long time. I am sure they will be working hard to get him match fit again but let’s face it, it comes down to whether Adebayor can be bothered.
"Crystal Palace were in desperate need of a goal scorer. If Adebayor is fit and if his mind is in the right place, he has ability.
"It is a gamble though because there are too many ifs in there."
Palace needed to do something
Shearer makes some salient points and Adebayor's attitude has been questioned throughout his career.
But the truth of the matter is Palace needed to do something to try to end their barren run in front of goal or face being dragged into a relegation dogfight.
There is usually one team that slips down and becomes embroiled in the battle towards the end of the season.
Having been relatively comfortable for most of the campaign it can catch players off guard when all of a sudden they are fighting for their lives.
But Palace will feel with or without Adebayor they have enough quality in the likes of Yohan Cabaye, Scott Dann, Jason Puncheon, James McArthur and Wilfried Zaha to consolidate for another season.