Beam Me Up, Scotty!: For some reason, the video games love to do this... but Heero never pulls apart the Twin Buster Rifles, fires, and starts spinning. Yes, it would be a wave of devastation, but by the time he gets Wing Zero he actually gives a damn about civilian casualties, and the Buster Rifles sure as HELL don't discriminate.
To clarify, that scene actually happens in the series, but Heero wasn't the one in the mecha at the time. In fact, all other 6 of the 7 people who pilot the Wing Zero execute this little trick, the odd one out of course being Heero.
Possibly a justified usage. In the video games, there is no risk of civilian casualties to speak of; it's giant robots only. And it is quite the powerful attack, so there's no reason for him NOT to do it. Just because his progression through the anime makes him more...Heeroic...it doesn't mean he wouldn't use the attack if he could get away with the whole "no innocents" thing.
Furthermore splitting the rifle and going to town simply isn't Heero's combat style, notably enough he only seems to fire the rifle when it counts.
Celebrity Voice Actor: Heero Yuy's Voice Actor, Mark Hildreth, is a well known T.V Actor. Unfortunately, he won't return to the role due to some reception issues.
Cross Dressing Voice: In Japan,Quatre was voiced by a woman. Pretty much averted in everywhere else expect for the Flippino dub and Taiwan dub. Also, Duo is voiced by a woman in the Taiwan dub.
Hey, It's That Voice!: The first of many Gundam dubs by The Ocean Group. The voice actors would be used in other Gundam, anime, and western cartoons. And being one of the first, this is were many fans have heard the VA's before.
Gundam fans might also recognize Dorothy's voice from a decade earlier, where it came out of Roux Louka's mouth. Actually referenced in a Wing-era interview where Naoko Matsui said that after ZZ wrapped, the staff asked her "If Gundam is still going in ten years, would you like to come back?" and she responded "Sure!"
There's a lot of overlap with X-Men: Evolution as well. Treize is Professor Xavier and Apocolypse, Duo is Wolverine, Trowa is Cyclops, Mariemaia is Shadowcat, Quatre is Nightcrawler, Heero is Angel, Noin is Callisto, Relena is Dr. Deborah Risman, and Milliardo is a hunter. Am I forgetting anyone?
The Other Darrin: Sally Po's dub actress changed after her first two appearances.
What Could Have Been: In the original draft, episodes 27 and 28 would have been flashbacks, revealing important moments from the Gundam pilots' and Relena's pasts. Unfortunately, scheduling conflicts arose which lead to head writer Katsuyuki Sumisawa quitting the series. The episodes were turned into recap episodes, and the backstories were archived in the manga Episode Zero.
Also, the designs of the Gundams themselves. The Wing Gundam isn't supposed to have any wings at all. Also, the Gundams also follow the national stereotypes trend in G Gundam, a trait largely achieved in the designs of the Shenlong, Sandrock, and Wing, which shares a similar color scheme with the God Gundam.
Word of God: Director Masashi Ikeda, in an interview with Animerica, said that he didn't intend on a romantic relationship between Heero and Relena because he thought that the political and symbolic relationships between the two were much more important. Yaoi Fangirls love to cite this interview as proof that Heero's gay, Quote Mining it (accidentally or intentionally) to remove the other things Ikeda said. Like the fact that he didn't intend on any romance (straight, gay, or whatever), or him saying it's only due to his own inability to write "boy-girl romance", or him saying that that doesn't mean Heero and Relena will never ever become a couple (he even admitted he could see it happening somewhere down the line).
One episode features what has to be one of the single most Genre Savvy mooks in the history of the franchise. This particular mook, whoom this troper seems to recall never even gets a name, comments that "Outer Space has a bad habit of sending menacing objects to Earth"...which summarizes, to some extent or another, not only Wing itself but the vast majority of Gundam series, both before and since.