"Long thought dead by many, Boba Fett -- possibly the last surviving clone of Jango -- has survived many brushes with death over the years. As the Yuuzhan Vong invade the galaxy, Fett mysteriously reappears with a band of Mandalorian hunters at his side. Fett and his team aid Han Solo and Princess Leia against the Yuuzhan Vong, though as always, Fett's true motivations are unclear. Is he bent merely on hunting the Vong? Or will he join the shattered forces of the Republic and the Jedi he has hated for so long? Heroes encountering Boba Fett during this era will usually find him with four to six other Mandalorians with similar armament, though he alone carries a jet pack. Older and wiser, Boba Fett remains as dangerous as ever. He flies a familiar Firespray-class attack/patrol ship modified to his personal specifications, usually flanked by at least four Mandalorians in Gladiator fighters. Though unpredictable, he may help the heroes if his objectives coincide with his own -- and if the heroes are not Yuuzhan Vong."
His arsenal will be suitable enough [1] to destroy Grievous [2], and he has enough skill to utterly stomp [3] someone on the level of Kota [4].
http://i38.servimg.com/u/f38/17/73/92/12/star_w10.jpg
--Star Wars: The Force Unleashed 2 [1]
http://static.comicvine.com/uploads/ignore_jpg_scale_super/11115/111152734/3751629-bobafettflying4_zps94943fad.jpg
--Star Wars: The Force Unleashed 2 [1]
http://static.comicvine.com/uploads/ignore_jpg_scale_medium/11115/111152734/3751635-2642208-fettfeat11.jpg
--(Star Wars Comic) [1]
http://www.starwars-universe.com/images/encyclopedie/miscellanees/crush.jpg
--Star Wars: Clone Wars Microseries [2]
http://i38.servimg.com/u/f38/17/73/92/12/star_w11.jpg
--Star Wars: The Force Unleashed 2 [3]
http://i38.servimg.com/u/f38/17/73/92/12/star_w12.jpg
--Star Wars: The Force Unleashed 2 [3]
http://i38.servimg.com/u/f38/17/73/92/12/the_fo10.jpg
--Star Wars: The Force Unleashed [4]
// I got to go though, study time. Cheers.
[1]
Scan one is his jetpack missile. Scan two is Boba avoiding starfighter/blaster fire. Scan three is his blaster on one of it's higher settings disintegrating someone. Why does any of this matter to Grievous? Grievous has tanked a rocket going off in his face casually.
http://static.comicvine.com/uploads/original/11111/111114474/4228585-tanks+rocket.gif
http://static.comicvine.com/uploads/original/11111/111114474/4228586-tanks+rocket2.gif
And his armor can also stop several shots from laser cannons, which are designed to take out ground and air vehicles as well as other starfighters and damage military structures.
http://static.comicvine.com/uploads/original/11111/111114474/4228461-physicals+description.png
http://static.comicvine.com/uploads/original/11111/111114474/4228513-laser+cannon.png
Not to mention the time Grievous walked out of being at the center of an explosion which engulfed the best part of an underground city.
http://static.comicvine.com/uploads/original/11111/111114474/4228570-tanks+explosionnn.png
http://static.comicvine.com/uploads/original/11111/111114474/4228571-tanks+explosionnn2.png
http://static.comicvine.com/uploads/original/11111/111114474/4228572-tanks+explosionnn3.png
http://static.comicvine.com/uploads/original/11111/111114474/4228573-tanks+explosionnn4.png
[2] Physical trauma is different from energy resistance, so unless Boba can break Grievous's armor with his bare hands or the Force, or has explosive output superior to what is posted above, I fail to see how Windu's Force crush feat is relevant. Great feat for Windu, though.
[3]/[4] Punching out Kota is a great feat considering Kota's own formidable status as a powerful Jedi. Only problem is Kota can't hold a candle to Grievous, and even if Boba was good enough to get past Grievous's lightsabers and punch him, he'd sooner break his hand than actually damage Grievous.
Grievous's physical capabilities vastly exceed Boba's, as well as his melee skill armed and unarmed, and his armor is more than enough to wade through any of Boba's armament that isn't dodged or deflected.
Grievous wrecks.