Lost Marbles are something you can find in the different zones you’ll visit during your adventure through Tiny Tina’s Wonderland. Here you’ll be navigated to the Lost Marbles which are scattered around Mount Craw.
Lost Marble Location #1 - The Shimmering Loch
Progress through Mount Craw until you exit the cave and enter The Shimmering Loch, then look to your right to find a house. Climb up onto the roof and drop down onto the balcony to find the Lost Marble.
Lost Marble Location #2 - The Shimmering Loch
Head to the house located to the left of the entrance of Baaldaar’s Lair and you’ll see a ladder nearby which leads to the second Lost Marble. However, beware of the pipe as it’ll shoot out wind which blow you off the cliff.