Flywrench is a very odd character. Instead of walljumping, pressing the jump button while flywrench is hugging a wall will have flywrench move vertically up the wall. This can be useful in levels that involve jumping up towers or corner hugging. Also, in addition to his main jump, Flywrench can make two more small jumps in mid air. However, he falls faster than any other character and, although he has access to a triple jump, each jump is weaker than the previous one.
Location: 4-18 "Boris"
Pro: Triple Jump, Wall slither, detaches from walls easier
Cons: Very Heavy, difficult to use and master