Impossible Chests and Love Magic

Okay, I've notices that throughout the game there are some chests that I just can't get. There's one in Maya Road that has a hole right in front of it and there are four in the Floating Empire. There's one right in the middle of four large blocks that prevent me from reaching it. There are two in this one section that has a great may blocks protecting it, but some of them disappear if I press down four switches at the bottom of the screen. I have tried every combination of switches by placing stuff on them but no matter what I can never reach the chests. The last one I can't get to is in the western part of the Empire, where you use portals yto jumps around to get to the switch. It's a room that has a portal in it, with two lines of blocks on either side of the entrance. The chest is on the bottom half of the screen, but it's blocked by the wall of blocks and I can't reach. There are a few others, I know, but I can't tink of any at the moment so if anyone els would like to chime in on hard to reach chests and how to get them, it would be much appreciated.

My second question is about love magic. I've found spells for every kind of magic there is except love magic and I'm wondering if I missed someting (perhaps in an impossible chest?). Also, there are some element crystals I can't find, such as light crystals (well, okay, I found two of those but they were completely random) and love crystals, which was requested of me by a character so I KNOW they're real. If I really do have to go around destroying gates (the things monsters arespawned out of) forever to get these crystals, could someone give me a cheat of hint for how to get one as quickly as possible?