Bone

Bone rewards you for grabbing items rather than for standing still. Every pickup grants +25% to walk and run speed for 4 seconds (Capsules and Tapes do not count), and the effect stacks until you hit a hard cap of 40 speed. A 5-star Toon runs at 30, so a single pickup already lifts it to 37.5 and the cap leaves almost no room for more. A 1-star Toon runs at 20 and has far more headroom, which is where stacking pays off.

Pebble, with 5 stars of Movement Speed and only 1 star of Extraction Speed, is the Toon whose stats lean toward roaming and collecting instead of camping a machine. The wiki notes that Bone once held the effect now used by Pull Toy, and was changed to its current form in version 0.2.0.

The Trinket comes from 100% Research on Twisted Pebble, a Main Twisted. Mains start at spawn weight 0 and are forced once every 20 floors, and Pebble's direct vision is 125, among the longest in the game, so approaching for encounters is risky. No Ichor is needed, and it can be claimed today.