is it possible to cheat on an GBA Cart w/ only a Slot1 Card?
and is there an App to Dump an Slot 2 SAV to a Slot 1 MicroSD?
No. There is no possible way to be able to cheat on the GBA slot using the slot1. When you are in GBA mode, the slot-1 is turned off and it is only using the slot-2. So either you have a slot2 flashcart, you will not be able to cheat/dump.
Come to the Irc room to get help or just have fun
Motivation alone is not enough. If you have an idiot and you motivate him, now you have a motivated idiot.