Yes. In Palworld v1.0.3, Bastigor can get Ferocious through currently verified methods: it is in the standard random pool. Ferocious is in the standard random passive pool in v1.0.3, so it can appear on a caught or bred Bastigor and be inherited from parents that have it. The facts behind this answer are graded B and come from 2 registered sources.
Reason
Attack +20%
Rank
3
Random pool
Yes
Other Pals
299
Bastigor breeding recipes
1
Fixed passives on Bastigor
0
Custom slots available
4
Verified evidence claims behind this verdict
1
Bastigor parent pairs with a direct source of Ferocious
1 of 1
Ferocious breeding route for Bastigor: 1 of 1 parent pair include a direct source (Bastigor).
Why
Ferocious is in the standard random passive pool in v1.0.3, so it can appear on a caught or bred Bastigor and be inherited from parents that have it.
How Ferocious can be acquired on Bastigor in v1.0.3
Current method
Available for Bastigor?
Note
Fixed / innate
No
Bastigor is born with no fixed passive.
Random pool (catch or hatch)
Yes
Ferocious is in the standard random pool, so it can appear on a caught or hatched Bastigor.
Implant (Surgery Table)
No
Ferocious: no verified item method grants it here.
Breeding inheritance
Yes
Bastigor can inherit Ferocious along a verified breeding chain, under the standard passive-inheritance rule this dataset has not independently sourced.
Verdict per requested component on Bastigor in Palworld v1.0.3
Ferocious is in the standard random passive pool in v1.0.3, so it can appear on a caught or bred Bastigor and be inherited from parents that have it.
B B · 1 source
How it reaches this Pal
Ferocious is in the standard random pool, so it can appear on a caught or hatched Bastigor.
299 Pals obtain Ferocious directly in v1.0.3 (Demon Eye, Depresso, Digtoise, Dinossom and Dinossom Lux).
Bastigor breeds only from two Bastigor parents in v1.0.3, so no other species can bring Ferocious into its line.
5 of 299 shown
What you can do now
Ferocious is in the standard random pool, so it can appear on a caught or hatched Bastigor.
Alternative: Bastigor can inherit Ferocious along a verified breeding chain, under the standard passive-inheritance rule this dataset has not independently sourced.