Golden Sun: The Lost Age/Kandorean Temple

This will be another in a long line of moral-bashing dungeons, where you (yet again) break into people's property, steal items, and run off after convincing anybody there that you are good guys in need of more power. You'll notice that the monks at the front gate won't let you past, so to get around this run around the left-hand side of the wall. At the end, Kraden will remark on a suspicious piece of ivy. If you've played Golden Sun you'll know exactly what to do here - get Sheba to use Whirlwind on it to scatter the ivy and reveal a cave entrance. Follow the watery path down here, and climb up the rope at the end. Congratulations, you're now an official trespasser! No-one seems to mind though, so go ahead into the temple.

Master Poi will be up on a high ledge, with three trainee monks practicing their levitation skills. All three of them seem to be pretty bad at it, but the one in the middle loses his patience and wants to enter the cave. Master Poi lets him, which turns out to be a mistake. Anyways, there's three of you, so you'll be fine. Enter the cave.

Inside the Cave
This is your first proper dungeon. The enemies down here aren't particularly tough, but the layout may make it somewhat hard to navigate. Go straight on and open the chest. It's a Mimic! Mimics will appear as treasure chests and you can be certain that there is one in every major dungeon. They're considerably tougher than standard enemies, but you get EXP as well as a relatively decent item off them when they die. If you haven't summoned Venus already, do so with Felix, or unleash Echo, or attack. Jenna should either attack or cast Fume, and Sheba should cast Ray. Repeat until the Mimic is dead. For the mean time it is of critical importance that you don't let any of your characters die, because for quite a while resurrecting characters is a costly and arduous process.

Once it dies, you get a Game Ticket (which is useless for the mean time). Go back and head left. Follow the long path around to the stairs down.