Certainly. You can use an editor to delete the cheats you don't want. At least thats what I used to do for R4.

 

I guess one way is to create seperate cheat files for certain games & not just rely on one big USRCheat file for all of them

So you could have a ACWW.DAT for Animal Crossing cheats and
Mario.DAT for mario games - then just choose the required database when you activate cheats

 

I've noticed this slowness too, it's sort of annoying but not too big of a deal for me.
I don't know why you are using usrcheat.dat, because it's not meant for Acekard according to the help file:

Acekard 2 uses either cheat.dat or cheat.xml.
I think unencrypted should run a bit faster, so you should try using cheat.xml.

 

SD card made in Japan is quite a bit faster when compared to the one made in Taiwan

 

Don't bother, it won't make much of a difference especially since this is unnoticeable at best.
And Another World is right, you have to press X to rebuild and next time the cheats menu will load instantly.

 

I'd also like to point out that it took the same amount of time to load the cheats (about 15 seconds for Pokemon Mystery Dungeon - Sky and 10 for Pokemon Platinum, the only two games I have with a lot of cheats) before and after performing the rebuild.

 

Like I said, I did the rebuild, and it still took just as long to load the next time. It's like it's not recognizing the .cc files or something.

 

No, I'm using the usrcheat.dat file from here, like I said in my first post.