POKE 23609,0
or POKE 23659,0

One of them was infinite lives for Manic Miner. I can't remember which.
( Smallbrainfield, Fri 22 Aug 2008, 11:09, archived)

poke 34269,30 gave you 30

( Cockweasle Vile Emperor, Fri 22 Aug 2008, 11:10, archived)

POKE 35136,0
( kingsuperspecial is a Barbie horse, I have my own shower of course., Fri 22 Aug 2008, 11:14, archived)