Yes. In Palworld v1.0.3, Jetragon can get Legend through currently verified methods: it is a fixed passive. Legend is a fixed passive on Jetragon in v1.0.3; every Jetragon has it. The facts behind this answer are graded B and come from 2 registered sources.
Reason
Attack +20%; Defense +20%; Movement Speed +15%
Rank
4
Random pool
No
Other Pals
6
Jetragon breeding recipes
1
Fixed passives on Jetragon
2
Custom slots available
2
Verified evidence claims behind this verdict
2
Jetragon parent pairs with a direct source of Legend
1 of 1
Legend breeding route for Jetragon: 1 of 1 parent pair include a direct source (Jetragon).
Why
Legend is a fixed passive on Jetragon in v1.0.3; every Jetragon has it.
How Legend can be acquired on Jetragon in v1.0.3
Current method
Available for Jetragon?
Note
Fixed / innate
Yes
Legend is fixed on Jetragon — it is born with it.
Random pool (catch or hatch)
No
Legend: no verified rule puts it in the random pool for Jetragon.
Implant (Surgery Table)
No
Legend: no verified item method grants it here.
Breeding inheritance
Yes
Jetragon can inherit Legend along a verified breeding chain, under the standard passive-inheritance rule this dataset has not independently sourced.
Verdict per requested component on Jetragon in Palworld v1.0.3
Legend is a fixed passive on Jetragon in v1.0.3; every Jetragon has it.
B B · 2 sources
How it reaches this Pal
Legend is fixed on Jetragon — it is born with it.
Every Jetragon in v1.0.3 is born with Legend, so none of its 1 breeding recipe has to carry it.
5 of 6 shown
What you can do now
Legend is fixed on Jetragon — it is born with it.
Alternative: Jetragon can inherit Legend along a verified breeding chain, under the standard passive-inheritance rule this dataset has not independently sourced.