"...more powerful than you could possibly imagine" - probably a reference to Obi-Wan's line in Star Wars Episode 4.
Ph34r m4 4ut|-|ority! = Fear ma authority! Possibly a reference to Cartman's famous "Respect ma authoritah!" line in South Park.
The number on Largo's credit card, in slightly unconventional l33t, reads "LEET BEER AND GEAR".