Using W-Item in FFVII to get 100 Megalixers was pretty damn useful. It also saved a lot of gil on Sylkis Greens, making getting a Gold Chocobo a much easier process. Costa Del Sol mansion was mine as a result.

I'm also going to be especially geeky and comment on a glitch in the original Tekken 5 for arcade (before the 5.1 patch fixed it) that made Heihachi a bitch to fight against. 1+2 (his little short-range 'hadoken') came out in less frames than the fastest jab of anyone else so if you 1,2,1+2-ed and your opponent blocked, you could 1+2 again 100% confident that their only options are block again or get hit. Jin used to be more abusable in Tekken 4 with the last hit of b,f+2,1,uf+2 being unblockable and really hard to sidestep.

Oh yes. And Missing No.