In Mont-Saint-Michel Im unable to move further since I dont have Sun Crest and key to unlok the door and Im unable to enter into time wrap. Please let me know if it is a bug

lock dude.
do now with jak and go to the place with the water, box, and the wall of steel and thorn when foling down fast.
so to stop them u need to use fire weapon and turn the torch when the wall is up.
bycraful the torch turn off fast.
and in the box u have a key.
goodluck.

U mean the Enja whip sword than yes after the warp through time w/ Ako get the Sun Crest, and than the Red Dragon eye. After that u will get a very hard speed puzzle that goes like this.

1st: Sun Moon Star same thing applies to the 2nd and 3rd phases of that very puzzle.

does anyone bother reading the question before answering?

He said that he CAN NOT SWITCH TO JACQUES. He did NOT ask what he shall do AFTER he has switched to Jacques...

I'd be happy if anyone could post a solution to this problem since I am currently having the same problem. I arrived at Mont-Saint-Michel and I am stuck since the warp gate will not allow me to switch to Jacques.

Try pressing every single button on the controller.

Also try looking at it from different angles before trying to use it.

Wow! That was quick and even an answer to the question! ;-)

Thanks!

I just managed to access the warp gate using the USE key as usual but looking AWAY from the warp gate (the trigger there must be somewhat broken).
It seems to work best standing at a 4-o-clock positon facing into the 8-o-clock position.

Glad I could help.

As per usual, ask if you need anything, alright?