If they aim to use it in a standard friendly environment where it'll be facing all sorts of things from different tiers, here's what I recommend:
Pidgeot@ Leftovers / Life Orb
{Tangled Feet} (All abilities are pretty crap, though)
Jolly nature (+Speed, -Sp. Attack)
EVs: 252 Attack / 252 Speed / 4 Defense
Brave Bird
Return
U-Turn
Defog / Roost / Quick Attack
Pidgeot has very few options, even after all these years. Brave Bird is your best STAB, with Return being close behind and finishing off opponents without recoil. U-Turn is Pidgeot's best coverage move, as well as allowing it to escape to a teammate, which is especially useful if you go with Defog, as Pidgeot can act as the team's entry hazard remover with the ability to escape as a threat switches in.
The last slot provides a multitude of options depending on how you want to play Pidgeot. Defog is better in a competitive environment, as it gives Pidgeot a niche that it can actually fulfill on the team, rather than just being there. Roost can keep it alive longer and mitigate it's weaknesses, though vs. higher tiered Pokemon, Pidgeot can't stomach many powerful hits. Quick Attack allows Pidgeot a way to finish off faster opponents that hang on after a Brave Bird.
That would be my recommendation. Alternately, if you can get a good Pidgeot from 5th gen, Heat Wave can be put in the last slot to deal damage to Steel types, but it's honestly not that good unless you hit something that's 4x weak to it. For that, you may want Naive nature.