Sally will often help you in tough times in Bugdom 2. She usually carries a map or a checkpoint and will trade the items for only acorns. Bring a acorn to her and she will give you items. She is located in almost all of the levels you will come across. In level 5 she will ask you to go slot cart racing with Sam the snail. If you win she will give you the key she is holding. This is the only level she asks for something and gives a map or a checkpoint in return.