I dunno if this is old or not, but it's not in the FAQ so here goes.
NOTE: this is quite well hidden, so pay attention!
Right at the beginning, after literally a couple of seconds, the fence on the right of the track will end and you will be able to go offroad and then onto the bridge which you can see overhead on the normal route. Follow it for a quicker rout to the cannon. --- At least Kyogre can actually edeguard. Unlike the other two water attacks in this game.
just before the 2 circles with daisy and luigi, there is a house and you can go up the stars and boost out the other side --- 95% of the population cannot do simple math. If you're one of the 10% that can, copy and paste this in your sig. pokemon pearl fc: 3007 5552 1162 Dan