Returning from LSWII PSP. This mode allows you to enter the level as any character, and you are tasked with finding 10 Blue Canisters in 20 Minutes. You'll get no studs, and you can't use any Extras, so it's a simple case of finding all 10 to complete the Challenge.
In general, it's a good idea to memorize how many characters you have until your primaries. You'll also want to note where the Protocol, Astromech, Bounty Hunter, and Sith are, so you can switch to them quickly. Otherwise, you have more than enough time to find all the Blue Canisters.
A common thought is to use a Ghost in these stages, as you can't be hit. Although any character works fine.
As always, each Episode is linked below: