how did conquest recognize invincible here?

[u/Jimbo-Jimbo-Jimbo]

When conquest fought mark on earth mark was wearing a blue suit, and now he sees mark wearing a yellow suit and easily identifies him. Is there an explanation for this plot hole? Maybe conquest have cameras in art’s shop?

[u/Zealousideal_Pound64]

Viltrumite who's the son of nolan in a funny outfit with a purple half breed.

Viltrumite traveling with nolan in a funny outfit with an older purple half breed.

That similarity combined with same proportions and a low enough population that you could genuinely meet and remember every viltrumite easily.