whether legends can be in other houses except for the legendary ones

Hi and welcome to forum :)

No , Legendary monsters MUST be put in Legendary habitat\house

@Haka-Taka
how to quickly get gold (2.5M)?

I have 16 lvl and the first legendary and I really need a gold egg hatching for 2d

@Kacper-Kozakiewicz Just build a lot of nature habitats, then put Pandakens in there.
Level up them and that's all.

@Edwin-Torres thanks