Infernape set:
Adamant, 252 Attack, 252 Speed, 6 HP
Choice Scarf
Flare Blitz
Close Combat
U-Turn
Stone Edge/Thunder Punch (I used Stone Edge)
Many of the people I battled in the 4th gen were surprised when I used this as a lead, because no one expected Choice Scarf at the time. I came up with this because I got a good Infernape on the GTS without a Speed nature. Close Combat and Flare Blitz are standard attacks, while U-Turn is for momentum. Stone Edge was filler, in case something resisted the other moves, though Thunderpunch lets you revenge DD Gyarados or something.
Even in the analysis, I don't see this moveset suggested, and I'm not sure why. It can get some surprising kills. Iron Fist would be recommended for the new generation, of course.
My Pearl FC is 2322 1212 8284, and I'd be interested in either a Timid HP Fire Latios or a Timid Jirachi. A Jolly Jirachi would be fine if it had the moveset of Iron Head, Thunder Punch, Fire Punch, and Trick.