I like to think that Neo's is Jaden's ace while out of the heroes, his absolute favorite is Flame wingman

To make Jaden's Ace even harder, in the Manga, he didn't get Neos or the Neo-Spacians; it was originally Elemental HERO Terra Firma, and later he changed to the Masked HEROes.

The funniest part about Sartorius is that Takehito Koyasu played both him and Arkana, who used Thousand Knives, YEARS before he played DIO, meaning it really was just predestined fate for him

I always felt like Black Tyranno was his ace, and Super Conductor Tyranno was his boss

Chazz dueling Aster in season 4 and telling Ojama Yellow he's his Ace monster and got him the win was awesome!

Neos is Jaden's ace monster. Neos is not just a card Jaden created, but it also represents Jaden's adaptability and growth throughout the series. If you look at Neos's ability to fuse with the neospaceions as well as other cards, plus the support it has, it kind of mirrors Jaden's ability to adapt and change things up when he needs to during a duel. Hence why I firmly believe Neos is Jaden's ace card.

I'm a GX fanboy and the funny thing is those aces really represent Jaden. Those listed are all his aces, because his deck is a Fusion deck. Those cards listed are a fusion of all the aspects we came to adore about him.

Jaden is so open-minded if he has this many Ace Cards.

I think it's funny that as a child Jaden played a way more complicated strategy in Yubel before switching to the more kid friendly Elemental HERO deck as he got older.

I think that it's pretty clear that flame wingman is Jaden's favorite elemental hero, Yubel was once Jaden's favorite monster and currently has a strong connection to him, winged Kuriboh is Jaden's spirit partner that he also has a strong connection with, polymerization is a signature card that Jaden uses, and Elemental Hero Neos is the de facto Ace monster of his deck ever since he got him in his deck.

I personally don't see Yubel or Winged Kuriboh as ace cards but spirits who are always there to protect Jaden. He uses them to for either for changing the tide of a duel or protect himself from idk surriving a fall from a skyscrapper

If there's any consolation, Konami recognized that Neos and Flame Wingman were both competing for Jaden's ace seat and decided that they both win since we see the Wingmen and Neos appear in cards together like Favorite Contact, Double Hero Attack, and Elemental Hero Shining Neos Wingman.

I think the easiest way to dictate which card is a character's ace card, is which card has the most support in their deck. In Jaden's case, Neos is the monsters with the most support in his deck, so it would be his ace monster.

I'd say Flame Wingman may be his favorite card, but considering Neos is the crux of Jaden's Deck, Neos is arguably his ace monster. Neos even appears in Bonds Beyond Time to defend him from Paradox.

The summoning of Neos Wiseman in the anime is very interesting. Its fusion materials are Neos and Yubel. It was summoned using Super Polymerization. Winged Kuriboh was discarded to activate it. And Neos Wiseman's effect is an upgraded version of Flame Wingman's effect.

Among Judai's cards that mean a lot to him, only Polymerization is not involved in that summon.

If Polymerization is Jaden's Ace because it's the card in all of his decks, then Mystical Space Typhoon  is my ace card

I think the reason why Chazz is so sick is cuz of the Ojamas. Hes such an edgy, mysterious, cool guy, but then he loves his Ojamas.
Actually, that’s probably why Manga Yuya is my favorite protag. He’s so his goofy guy, but then he’s got two other personalities in him that are just hardcore.
And Yugo.
God bless Yugo.

I feel like you could argue that Aster's other ace monsters could be Elemental HERO Phoenix Enforcer or Destiny HERO Doomlord, since he makes a big deal of them in duels and dresses as them when he's doing his vigilante thing.

You can tell my guy is starting to lose his mind whenever he was trying to figure out Jaden's ace card by the strand of his bangs slowly separating from the rest of his hair LOL

Neos is the ace, Flame Wingman is his favorite card, and Yubel and Winged Kuriboh are like guardians in Jaden's deck to keep Jaden safe.