I have played some Uber GS some months ago, but anyway with players that like me have never played it before. Some things abaut those battles:
- Zapdos was common as it was the best Lugia counter in the game.
- Heracross was very threatening as Lugia was his only common counter used.
- Physical moves were more useful than Specials and thus more common. Sometimes a TBolt / IB and then physical moves in things like Mew2, Ho-oh, some Lugias or whatever.
- Psychic moves were very rare.
- Mewtwo was pretty much like Ho-oh.
- Snorlax was not very common. Speed was important in Ubers and Fighting moves were common. And it loses 1vs1 against Cursing Lugia (Curselax).
- Celebi and Bliss were common Bellers.
- Forre was sometimes useful with Spikes, HP Bug, Explosion, whatever.
- I sometimes destroyed teams with ML+BP Umbreon, many players forget phazers!
- I have never seen a Skarmory, though thinking in it now it could be very useful for Lugia (with Curse) and for Heras, ocassional Laxes, and surely more things.